Chapter 7 — Inventory Accounting(存货核算)


Slide 7-1 — Understanding the Business

第7-1页——了解企业经营

Knowledge Points(知识点)

  • Primary Goals of Inventory Management (存货管理的主要目标)

Primary Goals of Inventory Management (存货管理的主要目标)

Explanation (解释):
The primary goals of inventory management are to provide sufficient quantities of high-quality inventory to meet customer needs while minimizing the cost of carrying that inventory.
存货管理的主要目标是:既要确保有足够数量、品质合格的存货以满足客户需求,又要尽量降低持有存货的成本。

Example (例子):
A retailer like Walmart must stock enough products to avoid stock-outs but also avoid over-ordering that increases storage and financing costs.
例如沃尔玛必须保持足够库存以防断货,但又不能过量进货造成仓储与资金占用成本上升。

Extension (拓展):
Balancing inventory availability and cost control improves profitability and working-capital efficiency.
在满足供货与控制成本之间取得平衡,可以提升盈利能力与营运资金使用效率。


Image/Data Analysis(图片/数据分析)

图中两个绿色方框说明:

  • “Provide sufficient quantities of high-quality inventory”(提供充足高质量库存)
  • “Minimize the costs of carrying inventory”(最小化持有成本)
    二者由红色箭头连至“Primary Goals of Inventory Management”,表示企业必须在服务水平与成本控制之间权衡

财务影响:

  • 存货不足 → 销售损失、客户流失;
  • 存货过多 → 占用现金、增加仓储费。

Summary (总结)

  • 存货管理的双重目标:保证供应 + 控制成本。
  • 优化存货水平有助于提升盈利与资金周转。

Slide 7-2 — Items Included in Inventory

第7-2页——存货的构成项目

Knowledge Points(知识点)

  • Definition of Inventory (存货定义)
  • Inventory Categories (存货类别)

Definition of Inventory (存货定义)

Explanation (解释):
Inventory includes tangible items held for sale or used to produce goods or services.
存货是企业为销售或用于生产商品、提供劳务而持有的有形资产。

Example (例子):
Retail goods, raw materials, and unfinished work are all part of inventory.
零售商品、原材料及在产品都属于存货。

Extension (拓展):
Accurate classification ensures correct valuation and financial-statement presentation.
正确分类有助于资产计价与报表列示的准确性。


Inventory Categories (存货类别)

Explanation (解释):
There are three main categories of inventory:

  1. Merchandise Inventory (商品存货)
  2. Raw Materials Inventory (原材料存货)
  3. Work in Process Inventory (在产品存货)
  4. Finished Goods Inventory (制成品存货)

Example (例子):
A furniture manufacturer keeps wood (planks) as raw materials, half-built tables as work in process, and completed tables as finished goods.
家具厂的木材属原材料、半成品桌属在产品、成品桌属制成品。

Extension (拓展):
Each type appears differently in cost tracking and financial reporting — raw materials and WIP affect production costs, while finished goods affect sales COGS.
各类存货在成本核算与财务报告中承担不同角色:原材料与在产品影响生产成本,制成品影响销售成本。


Image/Data Analysis(图片/数据分析)

图中展示:

  • 上层:Inventory 被分为“Tangible”“Held for Sale”“Used to Produce Goods or Services”;
  • 下层绿色框列示:Merchandise、Raw Materials、Work in Process、Finished Goods。

体现制造业与零售业存货差异


Summary (总结)

  • 存货涵盖销售品与生产用材料。
  • 四种主要类型反映不同业务阶段。
  • 分类准确有助于成本核算与报表编制。

Slide 7-3 — Inventories: Goods Held for Resale

第7-3页——存货:用于转售的商品

Knowledge Points (知识点)

  • Retailer vs. Manufacturer Inventory (零售商与制造商存货差异)

Retailer Inventory (零售商的存货)

Explanation (解释):
Retailers purchase finished goods and hold them for resale; thus they maintain a single inventory account called “Merchandise Inventory.”
零售商购入制成品以转售,因此仅设一个“商品存货”账户。

Example (例子):
A bookstore buys books from publishers and records them as Merchandise Inventory.
书店从出版社进货后记入商品存货。

Extension (拓展):
Inventory turnover and carrying cost analysis are vital for retailers to evaluate efficiency.
零售商通过周转率与持有成本评估运营效率。


Manufacturer Inventory (制造商的存货)

Explanation (解释):
Manufacturers maintain three separate inventory accounts — Raw Materials (RM), Work in Process (WIP), and Finished Goods (FG).
制造企业的存货分为原材料、在产品和制成品三类账户。

Example (例子):
汽车制造商:钢材 → 车身组装(WIP) → 整车(FG)。

Extension (拓展):
Tracking each stage helps in cost control and production efficiency measurement.
分阶段记录有助于成本控制与生产效率评估。


Image/Data Analysis(图片/数据分析)

图中说明:

  • 零售商:仅有 Finished Goods 库存;
  • 制造商:有 RM + WIP + FG 三类库存;
    右侧美元符号象征库存=资金

Summary (总结)

  • 零售商库存结构简单,仅商品存货。
  • 制造商库存分为三阶段,便于成本追踪。
  • 存货结构反映企业运营模式差异。

Slide 7-4 — Costs Included in Inventory Purchases

第7-4页——计入存货成本的项目

Knowledge Points (知识点)

  • Cost Principle (成本原则)
  • Components of Inventory Cost (存货成本构成)

Cost Principle (成本原则)

Explanation (解释):
According to the cost principle, inventory is recorded at the price paid or the consideration given to obtain it.
依据成本原则,存货应按取得时支付的金额或对价入账。

Example (例子):
If a company buys materials for 100 freight, inventory is recorded at 1,000 并支付运费 1,100。

Extension (拓展):
This ensures historical cost reliability and prevents unrealized profit recognition.
该原则保证资产按历史成本计价,避免未实现收益入账。


Components of Inventory Cost (存货成本构成)

Explanation (解释):
Inventory cost includes all expenses necessary to bring items to saleable condition and location — invoice price, freight, inspection, and preparation costs.
存货成本包括使商品达到可销售状态和地点所需的一切支出,如发票价、运费、检验费与准备费用。

Example (例子):
A manufacturer buys steel (500 freight, and 10,700.
制造商购钢材 500,检验费 10,700。

Extension (拓展):
Excluding such costs understates assets and profit; including excessive overheads overstates them.
漏计必要成本会低估资产与利润;过度分摊制造费用会高估两者。


Image/Data Analysis(图片/数据分析)

图示列出五个成本要素:

  • Invoice Price(发票价)
  • Freight(运费)
  • Inspection Costs(检验费)
  • Preparation Costs(准备费)
    并注明遵循“Cost Principle”。
    右侧工人图形强调成本的投入与劳动关系

Summary (总结)

  • 成本原则要求存货按实际支付金额入账。
  • 包含价款、运费、检验与准备费用。
  • 正确计量能确保资产真实反映企业投入。

Slide 7-5 — Flow of Inventory Costs

第7-5页——存货成本的流转

Knowledge Points(知识点)

  • Cost Flow in Merchandising Business(商品流通企业的成本流转)
  • Cost Flow in Manufacturing Business(制造企业的成本流转)

Cost Flow in Merchandising Business(商品流通企业的成本流转)

Explanation (解释):
For merchandisers, inventory costs flow from purchases to merchandise inventory and finally to cost of goods sold (COGS) when goods are sold.
对商品流通企业而言,成本流转顺序为:采购 → 商品存货 → 销售成本(COGS)。

Example (例子):
A retailer buys 10,000 商品,售出后成本从“存货”转入“销售成本”。

Extension (拓展):
This system captures the matching of costs and revenues, ensuring that only sold goods appear as expenses in the income statement.
该机制体现配比原则,确保仅已售商品的成本计入当期费用。


Cost Flow in Manufacturing Business(制造企业的成本流转)

Explanation (解释):
For manufacturers, inventory costs pass through multiple stages: Raw Materials → Work in Process → Finished Goods → COGS.
制造企业的成本流转经过多个阶段:原材料 → 在产品 → 制成品 → 销售成本。

Example (例子):
A factory uses 1,000 labor to produce goods; upon completion, these costs move to “Finished Goods” and then to “COGS” once sold.
工厂使用 1,000 人工生产产品,完成后成本转入制成品,售出时再转入销售成本。

Extension (拓展):
Each transition provides control over production efficiency and helps identify cost bottlenecks in operations.
各阶段转移反映生产效率,有助于发现成本瓶颈。


Image/Data Analysis(图片/数据分析)

图中分两部分:

  • Merchandiser:Merchandise Purchases → Merchandise Inventory → COGS。
  • Manufacturer:Raw Materials + Direct Labor + Factory Overhead → WIP → Finished Goods → COGS。

红色箭头表示成本流转方向,蓝色框代表制造阶段。
体现制造企业比零售企业多两级成本积累环节


Summary (总结)

  • 商品流通企业:采购→存货→COGS。
  • 制造企业:原材料→在制→制成→COGS。
  • 成本流转确保费用与收入配比。

Slide 7-6 — Nature of Cost of Goods Sold

第7-6页——销售成本的构成原理

Knowledge Points(知识点)

  • Relationship between Inventory and COGS(存货与COGS的关系)
  • Formula for Computing COGS(销售成本计算公式)

Relationship between Inventory and COGS(存货与COGS的关系)

Explanation (解释):
COGS connects the beginning and ending inventories through purchases and sales during the period.
销售成本通过期间的采购与销售,将期初和期末存货联系起来。

Example (例子):
Beginning Inventory + Purchases = Goods Available for Sale
Goods Available for Sale − Ending Inventory = COGS

Extension (拓展):
This formula ensures correct matching of costs to revenues and is essential for determining gross profit.
该公式保证成本与收入正确配比,是计算毛利的核心。


Formula for Computing COGS(销售成本计算公式)

Explanation (解释):

销售成本 = (期初存货 + 本期采购)− 期末存货。

Example (例子):
期初库存 20,000,期末库存 21,000。

Extension (拓展):
If ending inventory is overstated, COGS will be understated, leading to overstated profits.
若期末存货高估,COGS 被低估,利润会被高估。


Image/Data Analysis(图片/数据分析)

图表显示成本流动路径:

  • Beginning Inventory 与 Purchases 汇总为 “Goods Available for Sale”;
  • 其中一部分成为 COGS(损益表项目),另一部分成为 Ending Inventory(资产负债表项目)。

蓝色底框中的公式强调两步计算:

  1. Beginning Inv. + Purchases = Goods Available for Sale
  2. Goods Available for Sale − Ending Inv. = COGS

Summary (总结)

  • 销售成本计算体现存货流转关系。
  • COGS = (期初 + 采购) − 期末。
  • 正确计算COGS是毛利分析的前提。

Slide 7-7 — Periodic Inventory System

第7-7页——定期盘存制

Knowledge Points(知识点)

  • Definition of Periodic System(定期盘存制定义)
  • Features of Periodic System(定期盘存制特点)

Definition of Periodic System(定期盘存制定义)

Explanation (解释):
The periodic system records purchases in a “Purchases” account and updates the Inventory account only at the end of the fiscal period after a physical count.
定期盘存制下,购入商品记入“采购”账户,期末通过实地盘点调整“存货”账户。

Example (例子):
A company records goods bought in January as Purchases. At year-end, it counts remaining inventory and adjusts COGS accordingly.
公司1月购货记入“采购”,年末盘点后调整存货并计算销售成本。

Extension (拓展):
This method is simpler and cheaper but provides no real-time inventory data.
该制度简便经济,但无法提供实时库存信息。


Features of Periodic System(定期盘存制特点)

Explanation (解释):

  • Inventory not continuously tracked.
  • COGS must be calculated after physical count.
  • Appropriate for small businesses with low-volume inventory.
    存货不连续更新,销售成本需盘点后计算,适用于存货量小的企业。

Example (例子):
A small boutique shop uses a periodic system to record monthly purchases and conducts an annual physical count.
一家服装小店采用定期盘存制,每年盘点一次库存。

Extension (拓展):
While reducing record-keeping workload, the system increases risk of undetected theft or spoilage.
虽简化记录,但增加了盗损与变质风险。


Image/Data Analysis(图片/数据分析)

图表列出关键点:

  • Purchases account used to record buys.
  • Inventory updated at year-end.
  • Must calculate COGS because not tracked during the year.

黄色框提示:“You must calculate the cost of goods sold as you have not kept track of it.”


Summary (总结)

  • 定期盘存制仅期末调整存货。
  • 无法实时追踪库存与COGS。
  • 适用于小型或人工管理的企业。

Slide 7-8 — Perpetual Inventory Systems

第7-8页——永续盘存制

Knowledge Points(知识点)

  • Definition of Perpetual System(永续盘存制定义)
  • Comparison with Periodic System(与定期盘存制的对比)

Definition of Perpetual System(永续盘存制定义)

Explanation (解释):
The perpetual system maintains continuous, up-to-date records of inventory and COGS as goods are bought and sold.
永续盘存制在每笔购销时实时更新存货与销售成本。

Example (例子):
A supermarket using a barcode system automatically updates inventory and COGS after each sale.
超市通过条码系统在每次结账后自动更新库存与销售成本。

Extension (拓展):
This method provides accurate real-time data for decision-making and reduces year-end adjustments.
该制度可提供实时数据,便于决策并减少年末调整。


Comparison with Periodic System(与定期盘存制对比)

Explanation (解释):
Unlike the periodic system, the perpetual system does not require COGS calculation at year-end because all data are updated continuously.
与定期盘存制不同,永续盘存制不需期末再计算COGS,因为系统已实时记录。

Example (例子):
Periodic: 需盘点计算COGS。
Perpetual: 系统自动更新库存与COGS。

Extension (拓展):
Although more costly to implement (software, equipment), perpetual systems are the standard in modern accounting systems.
虽然成本较高,但永续盘存制已成为现代企业标准。


Image/Data Analysis(图片/数据分析)

图示显示:

  • 左侧紫框“Perpetual System”,右侧两箭头分别指出:
    • 提供 up-to-date inventory records(实时库存记录)
    • 提供 up-to-date cost of sales records(实时销售成本记录)
      底部黄色提示框对比定期制:后者需盘点后计算COGS。

Summary (总结)

  • 永续盘存制实时更新存货与COGS。
  • 相比定期盘存制,准确度与时效性更高。
  • 是现代信息化企业的首选系统。

Slide 7-9 — Inventory Systems: Periodic (To Buy & To Return)

第7-9页——定期盘存制:采购与退货分录

Knowledge Points(知识点)

  • Journal Entry for Purchases(采购分录)
  • Journal Entry for Returns(退货分录)

Journal Entry for Purchases(采购分录)

Explanation (解释):
Under the periodic system, purchases are recorded in a separate “Purchases” account rather than directly in “Inventory.”
在定期盘存制下,购货时借记“采购”账户,而不是直接借记“存货”。

Example (例子):
企业赊购商品 $5,000:

Dr. Purchases 5,000
Cr. Accounts Payable 5,000

Extension (拓展):
This approach simplifies bookkeeping during the year, but requires a year-end adjustment to transfer purchases into inventory and compute COGS.
这种方法简化了日常记录,但期末需调整以计算销售成本。


Journal Entry for Returns(退货分录)

Explanation (解释):
When goods are returned to suppliers, the payable amount decreases and “Purchase Returns and Allowances” is credited.
当商品退回供应商时,应付账款减少,贷记“采购退回与折让”账户。

Example (例子):
退回商品 $500:

Dr. Accounts Payable 500
Cr. Purchase Returns and Allowances 500

Extension (拓展):
Recording returns separately allows management to monitor supplier quality and return frequency.
单独记录退货有助于监控供应商质量与退货率。


Image/Data Analysis(图片/数据分析)

图中有两个分录框:
1 To Buy:Purchases – Accounts Payable
2 To Return:Accounts Payable – Purchase Returns and Allowances
底部说明“Assumes the gross approach is taken”,即采用总价法(不提前扣除折扣)。

财务影响:

  • Purchases 增加 → 提高库存准备;
  • Returns 减少采购总额 → 降低期末可供销售商品。

Summary (总结)

  • 定期盘存制下,采购与退货分别计入独立账户。
  • 采用总价法记录,简化操作。
  • 年末再统一调整入存货与COGS。

Slide 7-10 — Inventory Systems: Periodic (To Sell)

第7-10页——定期盘存制:销售分录

Knowledge Points(知识点)

  • Journal Entry for Sales(销售分录)
  • No Immediate COGS Recognition(销售成本延迟确认)

Journal Entry for Sales(销售分录)

Explanation (解释):
Under the periodic system, sales are recorded only for revenue; COGS is not recorded until period-end.
定期盘存制下,销售仅记录收入,不在当时确认销售成本。

Example (例子):
赊销商品 $2,000:

Dr. Accounts Receivable 2,000
Cr. Sales 2,000

Extension (拓展):
This reduces daily bookkeeping but delays profitability analysis since costs are unknown until year-end.
这种方法简化了日常记录,但毛利计算需等期末才能完成。


Image/Data Analysis(图片/数据分析)

图示分录:

To Sell:
Accounts Receivable XX
Sales XX
注释:At end of period the inventory must be counted and adjusted, COGS calculated.

说明COGS需待盘点完成后才能计算。
此制下销售与成本分离,利润暂时被高估。


Summary (总结)

  • 销售时仅记录收入,不即时确认COGS。
  • 期末盘点后再计算真实成本。
  • 简化操作但信息滞后。

Slide 7-11 — Inventory Systems: Periodic (Year-End Adjustments)

第7-11页——定期盘存制:期末调整分录

Knowledge Points(知识点)

  • Adjusting Entry when Ending Inventory > Beginning Inventory(期末高于期初的调整)
  • Adjusting Entry when Ending Inventory < Beginning Inventory(期末低于期初的调整)

Adjustment when Ending Inventory > Beginning Inventory(期末库存大于期初)

Explanation (解释):
If ending inventory exceeds beginning inventory, the company sold fewer goods; thus, part of Purchases remains as inventory.
若期末库存高于期初,说明售出商品较少,部分采购尚未转为费用。

Example (例子):

Dr. Inventory (End−Beg)
Cr. Purchases
Dr. COGS XX

Extension (拓展):
This entry increases assets (inventory) and reduces COGS, showing higher profit for the period.
该分录增加资产、减少成本,使利润上升。


Adjustment when Ending Inventory < Beginning Inventory(期末库存小于期初)

Explanation (解释):
If ending inventory is less than beginning inventory, the company sold more goods; thus, COGS must increase.
若期末库存低于期初,说明售出更多商品,应增加销售成本。

Example (例子):

Dr. COGS XX
Cr. Inventory (Beg−End)
Cr. Purchases

Extension (拓展):
This entry transfers excess cost to expense, ensuring correct profit recognition.
该调整将多消耗的成本转入费用,保证利润准确。


Image/Data Analysis(图片/数据分析)

图中上下两框:

  • 上:期末 > 期初 → 存货增加,COGS减少。
  • 下:期末 < 期初 → 存货减少,COGS增加。

展示定期盘存制通过调整存货与采购账户实现成本结转。
财务影响:存货上升 = 资产增加 + 利润上升。


Summary (总结)

  • 期末>期初 → COGS减少,利润上升。
  • 期末<期初 → COGS增加,利润下降。
  • 定期盘存制需期末调整存货与采购账户。

Slide 7-12 — Inventory Systems: Perpetual (To Buy)

第7-12页——永续盘存制:采购分录

Knowledge Points(知识点)

  • Recording Purchases under Perpetual System(永续盘存制下的采购记录)
  • Difference from Periodic System(与定期盘存制的区别)

Recording Purchases under Perpetual System(永续盘存制下的采购记录)

Explanation (解释):
Under the perpetual system, inventory purchases are recorded directly in the “Inventory” account rather than “Purchases.”
在永续盘存制下,采购直接借记“存货”账户,不使用“采购”账户。

Example (例子):
购货 $5,000(总价法):

Dr. Inventory 5,000
Cr. Accounts Payable 5,000

Extension (拓展):
This ensures real-time tracking of asset levels and cost per item, improving managerial control.
此法可实时反映存货与单位成本,便于管理决策。


Difference from Periodic System(与定期盘存制的区别)

Explanation (解释):
Perpetual records each transaction immediately, while periodic summarizes them at period-end.
永续制逐笔记录交易,定期制在期末汇总。

Example (例子):
Periodic: Purchases account used; adjust later.
Perpetual: Direct Inventory entry; no end adjustment.

Extension (拓展):
This system aligns with automated scanning systems and modern ERP tools, ensuring continuous accuracy.
该制度与自动化扫码及ERP系统结合,提高数据准确性。


Image/Data Analysis(图片/数据分析)

图示展示:

Journal Entry to Buy (Gross Method)
Inventory XX
A/P XX

说明永续盘存制实时更新存货余额,无需另设采购账户。
下方说明文字强调:“COGS is not calculated later because you keep track of it as goods are sold.”


Summary (总结)

  • 永续盘存制:采购直接入存货。
  • 实时反映库存,无需期末调整。
  • 适用于自动化与高频交易企业。

Slide 7-13 — Inventory Systems: Periodic (Year-End Adjustment Example)

第7-13页——定期盘存制:期末调整示例

Knowledge Points(知识点)

  • Adjustment When Ending Inventory > Beginning Inventory(期末高于期初的情况)
  • Adjustment When Ending Inventory < Beginning Inventory(期末低于期初的情况)

Adjustment When Ending Inventory > Beginning Inventory(期末库存高于期初)

Explanation (解释):
If ending inventory is greater than beginning inventory, it means not all purchases were sold, and part of purchases should remain as inventory.
若期末库存高于期初,说明并非所有采购都已售出,部分采购应留存为期末存货。

Example (例子):
假设期初存货 3,000:

Dr. Inventory 1,000
Cr. Purchases 1,000

(期末库存增加 $1,000)

Extension (拓展):
This increases total assets and reduces COGS, thus increasing reported profit.
此操作会增加资产、减少销售成本,从而提升净利润。


Adjustment When Ending Inventory < Beginning Inventory(期末库存低于期初)

Explanation (解释):
If ending inventory is less than beginning inventory, more goods were sold than purchased; COGS must increase.
若期末库存低于期初,表示销售量大于采购量,销售成本应上升。

Example (例子):
假设期初存货 2,000:

Dr. COGS 1,000
Cr. Inventory 1,000

Extension (拓展):
This reduces assets and increases expense, resulting in lower net income.
此调整减少资产并增加费用,导致利润下降。


Image/Data Analysis(图片/数据分析)

图中分为上下两栏:
1 上栏:期末 > 期初 → 借记库存,贷记采购。
2 下栏:期末 < 期初 → 借记COGS,贷记库存。
每种情况说明不同方向的利润影响。

财务影响总结:

  • 存货上升 → COGS下降 → 净利润上升。
  • 存货下降 → COGS上升 → 净利润下降。

Summary (总结)

  • 期末>期初:资产上升、利润增加。
  • 期末<期初:资产下降、利润减少。
  • 定期盘存制通过调整库存与采购账户计算真实COGS。

Slide 7-14 — Inventory Systems: Perpetual (To Buy & Record)

第7-14页——永续盘存制:采购与记录

Knowledge Points(知识点)

  • Real-Time Recording of Inventory(实时记录存货)
  • No Need for End-of-Period Adjustment(无需期末调整)

Real-Time Recording of Inventory(实时记录存货)

Explanation (解释):
Under the perpetual system, every purchase and sale automatically updates the Inventory account.
在永续盘存制下,每次购销交易都会自动更新“存货”账户。

Example (例子):
购货 $10,000:

Dr. Inventory 10,000
Cr. Accounts Payable 10,000

Extension (拓展):
Inventory count at year-end is only for verification, not for recalculating balances.
期末盘点仅用于核对准确性,而非重新计算库存余额。


No Need for End-of-Period Adjustment(无需期末调整)

Explanation (解释):
Because COGS is continuously updated, no year-end calculation is required.
由于销售成本实时更新,年末无需再计算。

Example (例子):
全年系统自动记录销售与COGS:

Dr. COGS
Cr. Inventory
因此不需期末再做汇总分录。

Extension (拓展):
This allows accurate interim financial reporting and improves audit transparency.
此系统便于编制中期报表并提升审计透明度。


Image/Data Analysis(图片/数据分析)

图中示例分录:

Inventory XX
Accounts Payable XX

说明采用总价法(Gross Method)
下方文字强调:“COGS is not a calculated figure as you keep track of it as goods are sold.”
意味着销售成本已在销售时自动确认。


Summary (总结)

  • 永续盘存制实时更新存货与COGS。
  • 期末仅核对库存,无需重新计算。
  • 适合ERP与大型零售系统。

Slide 7-15 — Inventory Systems: Perpetual (To Return & To Sell)

第7-15页——永续盘存制:退货与销售分录

Knowledge Points(知识点)

  • Recording Returns(退货分录)
  • Recording Sales & COGS Simultaneously(同步记录销售与成本)

Recording Returns(退货分录)

Explanation (解释):
When returning goods, both liability and inventory decrease.
退货时应付账款与存货同时减少。

Example (例子):
退回商品 $1,000:

Dr. Accounts Payable 1,000
Cr. Inventory 1,000

Extension (拓展):
This maintains accurate stock valuation and supports perpetual updating.
此分录保持库存账面价值准确。


Recording Sales & COGS Simultaneously(同步记录销售与成本)

Explanation (解释):
In perpetual systems, each sale triggers two entries — one for revenue, one for COGS.
在永续盘存制下,每笔销售需要两笔分录:一笔确认收入,一笔确认销售成本。

Example (例子):
销售商品 3,000):

Dr. Accounts Receivable 5,000
Cr. Sales 5,000
Dr. COGS 3,000
Cr. Inventory 3,000

Extension (拓展):
This ensures immediate and accurate gross profit tracking after every sale.
每笔销售后即可即时获得毛利数据,提高分析精度。


Image/Data Analysis(图片/数据分析)

上框:退货分录 A/P–Inventory;
下框:销售分录包含 A/R–Sales 与 COGS–Inventory。
该图体现永续盘存制在每笔交易中双向更新收入与成本

财务影响:

  • 减少延迟确认误差;
  • 提供实时利润信息。

Summary (总结)

  • 永续制下退货直接减少库存。
  • 销售分录同步确认收入与成本。
  • 毛利实时计算,提升信息精度。

Slide 7-16 — Perpetual vs. Periodic Inventory Systems

第7-16页——永续与定期盘存制比较

Knowledge Points(知识点)

  • Major Differences between Systems(系统间主要差异)
  • Impact on Financial Reporting(对财务报告的影响)

Major Differences between Systems(系统间主要差异)

Explanation (解释):
The periodic system updates inventory only at period-end; the perpetual system updates continuously.
定期盘存制仅在期末调整存货,而永续盘存制实时更新。

Example (例子):

项目定期盘存制永续盘存制
期初存货延续上期余额延续上期余额
采购计入 Purchases 账户计入 Inventory 账户
期末存货盘点后更新每次销售后更新
销售成本期末计算实时计算

Extension (拓展):
Perpetual provides real-time accuracy, while periodic reduces operational complexity.
永续制精确但操作复杂;定期制简单但信息滞后。


Impact on Financial Reporting(对财务报告的影响)

Explanation (解释):
Perpetual systems enhance reporting timeliness; periodic systems may delay recognition of losses or obsolescence.
永续盘存制提升报表及时性;定期盘存制可能延迟损失与过时存货的确认。

Example (例子):
若发生盗损,永续制可立即反映差额;定期制需待盘点后发现。

Extension (拓展):
Modern ERP systems favor perpetual tracking for compliance and efficiency.
现代ERP系统倾向永续追踪,以提升合规性与效率。


Image/Data Analysis(图片/数据分析)

图表列出关键对比:

  • 定期制依赖盘点;永续制依赖系统。
  • 定期制COGS期末计算;永续制实时更新。
    颜色区分黄色(Periodic)与绿色(Perpetual),突显差异。

Summary (总结)

  • 永续制提供实时准确记录;定期制简化但滞后。
  • 现代企业趋向采用永续系统。
  • 二者的选择取决于企业规模与信息化水平。

Slide 7-17 — Perpetual Inventory System (Illustration)

第7-17页——永续盘存制示例

Knowledge Points(知识点)

  • Step-by-Step Updates under Perpetual System(永续盘存制下的逐步更新)
  • Real-Time COGS and Inventory Control(实时的成本与库存控制)

Step-by-Step Updates under Perpetual System(永续盘存制下的逐步更新)

Explanation (解释):
Under the perpetual system, each purchase or sale immediately updates both the Inventory and COGS accounts.
永续盘存制下,每次采购与销售都会即时更新“存货”和“销售成本”账户。

Example (例子):

日期事项会计分录摘要
Jan. 1期初存货 800件 × $50Beginning Inventory = $40,000
Apr. 14采购 1,100件 × $50Dr. Inventory 55,000 / Cr. A/P 55,000
Nov. 30销售 1,300件 × $83Dr. A/R 107,900 / Cr. Sales 107,900;Dr. COGS 65,000 / Cr. Inventory 65,000
Dec. 31年末无需调整分录(系统已更新)

Extension (拓展):
Because perpetual systems automatically track transactions, no COGS calculation is needed at year-end.
系统自动追踪所有交易,因此年末无需重新计算销售成本。


Real-Time COGS and Inventory Control(实时的成本与库存控制)

Explanation (解释):
Inventory balances are always current, allowing immediate financial insight.
库存余额始终最新,使企业能即时掌握财务状况。

Example (例子):
管理层可随时查看毛利率或库存周转率,支持动态定价决策。

Extension (拓展):
This enhances decision-making accuracy and helps prevent stockouts or overstocking.
实时数据提高决策准确性,避免断货与积压。


Image/Data Analysis(图片/数据分析)

图中时间轴展示四个日期:

  • Jan.1:期初存货;
  • Apr.14:增加库存;
  • Nov.30:销售并即时记录COGS;
  • Dec.31:无需期末调整。

蓝色箭头代表库存实时变化,绿色箭头代表COGS即时确认。


Summary (总结)

  • 永续盘存制在每次交易时更新库存与成本。
  • 不需年末再调整COGS。
  • 提高报表准确性与库存管理效率。

Slide 7-18 — Periodic Inventory System (Illustration)

第7-18页——定期盘存制示例

Knowledge Points(知识点)

  • Step-by-Step Accounting under Periodic System(定期盘存制下的分步记录)
  • End-of-Period Adjustment for COGS(期末销售成本调整)

Step-by-Step Accounting under Periodic System(定期盘存制下的分步记录)

Explanation (解释):
The periodic system accumulates all purchases in the Purchases account and updates inventory only after a physical count.
定期盘存制将所有采购汇总于“采购”账户,期末盘点后才更新“存货”余额。

Example (例子):

日期事项会计分录摘要
Jan. 1期初存货:800件 × $50Beginning Inventory = $40,000
Apr. 14采购:1,100件 × $50Dr. Purchases 55,000 / Cr. A/P 55,000
Nov. 30销售:1,300件 × $83Dr. A/R 107,900 / Cr. Sales 107,900
Dec. 31期末盘点:库存价值 $30,000调整分录:Dr. COGS 65,000 / Dr. Inventory 10,000 / Cr. Purchases 55,000

Extension (拓展):
This method simplifies daily bookkeeping but delays cost accuracy until after the count.
该制度简化日常记录,但需盘点后才能得出真实成本。


End-of-Period Adjustment for COGS(期末销售成本调整)

Explanation (解释):
COGS is computed at the end of the period using the formula:

销售成本 = 期初存货 + 本期采购 − 期末存货。

Example (例子):
COGS = 40,000 + 55,000 − 30,000 = $65,000

Extension (拓展):
This formula ensures cost and revenue are properly matched despite non-continuous tracking.
即使未实时追踪,该公式也保证成本与收入配比正确。


Image/Data Analysis(图片/数据分析)

图中展示同样的四个日期:

  • Jan.1 与 Apr.14 分录与永续制相似;
  • Nov.30 销售时不记成本;
  • Dec.31 调整分录计算COGS。

红色箭头指示期末调整点。
结果:COGS = 30,000。


Summary (总结)

  • 定期盘存制通过期末盘点计算COGS。
  • 年内不更新库存余额。
  • 永续制实时更新,定期制依赖期末调整。

Slide 7-19 — Errors in Measuring Ending Inventory

第7-19页——期末存货计量错误的影响

Knowledge Points(知识点)

  • Types of Inventory Errors(存货计量错误类型)
  • Financial Statement Impact(对财务报表的影响)

Types of Inventory Errors(存货计量错误类型)

Explanation (解释):
Errors in counting or pricing ending inventory affect both the balance sheet and income statement.
期末存货在数量或单价上的错误会同时影响资产负债表与损益表。

Example (例子):
若期末库存实际为 60,000,则:

  • 资产被高估 $10,000;
  • COGS 被低估 $10,000;
  • 净利润被高估 $10,000。

Extension (拓展):
Because the ending inventory of one period becomes the beginning inventory of the next, the error reverses automatically.
期末存货成为下一期的期初存货,因此错误将在下一期自动抵消。


Financial Statement Impact(对财务报表的影响)

Explanation (解释):
Overstated or understated inventory directly changes reported income and retained earnings.
存货的高估或低估直接影响利润与留存收益。

Example (例子):
若低估存货 5,000,下一期利润被高估 $5,000。

Extension (拓展):
Proper inventory control and auditing are essential to prevent misstated financial results.
准确的库存控制与审计制度是避免报表失真的关键。


Image/Data Analysis(图片/数据分析)

表格展示四种情况的影响方向:

项目期末高估期末低估期初高估期初低估
期末存货 (资产)+
留存收益++
销售成本 (COGS)++
净利润++

绿色“+”表示高估,红色“−”表示低估。


Summary (总结)

  • 存货错误影响资产、COGS与净利润。
  • 本期的错误会在下一期反向抵消。
  • 需严格控制盘点与定价流程。

Slide 7-20 — Goods-in-Transit

第7-20页——在途商品(所有权确认)

Knowledge Points(知识点)

  • FOB Shipping Point vs. FOB Destination(装运点交货与目的地交货)
  • Ownership Recognition Timing(所有权确认时点)

FOB Shipping Point vs. FOB Destination(装运点交货与目的地交货)

Explanation (解释):
FOB (Free on Board) terms determine when ownership of goods transfers from seller to buyer.
FOB 条款决定货物所有权何时从卖方转移至买方。

Example (例子):

条款所有权转移时点存货属于收入确认时间
FOB Shipping Point发货时买方发货当日
FOB Destination到货时卖方到货当日

Extension (拓展):
Correctly identifying ownership ensures accurate recognition of inventory and revenue.
正确判断所有权转移可确保存货与收入的准确确认。


Ownership Recognition Timing(所有权确认时点)

Explanation (解释):

  • FOB Shipping Point → Buyer owns goods during transit.
  • FOB Destination → Seller owns goods until delivery.
    装运点交货:买方在运输途中即拥有货物;
    目的地交货:卖方在货到时才转移所有权。

Example (例子):
若卖方12月30日发货(FOB Shipping Point),货物1月5日到达,则买方应在12月确认存货。

Extension (拓展):
Failure to classify correctly leads to misstated assets and premature or delayed revenue recognition.
若分类错误,可能导致资产或收入提前/延迟确认。


Image/Data Analysis(图片/数据分析)

图示两条路线:

  • 左侧“FOB Shipping Point”箭头:Ownership transfers when goods leave seller’s dock.
  • 右侧“FOB Destination”箭头:Ownership transfers upon arrival at buyer’s location。
    灰色卡车代表运输途中,标注“Goods in Transit”。

Summary (总结)

  • FOB 条款决定存货与收入的确认时点。
  • 装运点:买方持有;目的地:卖方持有。
  • 判断准确性直接影响资产与利润。

Slide 7-21 — Goods-in-Transit: FOB Shipping Point

第7-21页——在途商品:装运点交货(FOB Shipping Point)

Knowledge Points(知识点)

  • Transfer of Ownership under FOB Shipping Point(装运点交货下的所有权转移)
  • Accounting Treatment for Buyer and Seller(买卖双方的会计处理)

Transfer of Ownership under FOB Shipping Point(装运点交货下的所有权转移)

Explanation (解释):
Under FOB shipping point, ownership of goods transfers to the buyer once the goods leave the seller’s premises.
在FOB装运点交货下,货物一旦离开卖方仓库,所有权即转移给买方。

Example (例子):
Company A ships goods to Company B on Dec 28 (FOB Shipping Point), goods arrive Jan 3.
→ Goods belong to Company B as of Dec 28, and must be included in its ending inventory.

Extension (拓展):
This ensures compliance with the Revenue Recognition Principle, allowing the seller to record sales when shipment occurs.
此规则符合收入确认原则,卖方可在发货时确认销售收入。


Accounting Treatment for Buyer and Seller(买卖双方的会计处理)

Explanation (解释):

  • Buyer: Records inventory when goods are shipped.
  • Seller: Records sale and removes goods from inventory at shipment date.
    买方在发货日计入存货,卖方在发货日确认销售并减少存货。

Example (例子):

角色分录示例日期
BuyerDr. Inventory / Cr. Accounts PayableDec 28
SellerDr. Accounts Receivable / Cr. Sales + Dr. COGS / Cr. InventoryDec 28

Extension (拓展):
This method accurately reflects risk transfer and prevents understated inventory or premature income delays.
此处理能准确反映风险转移,避免资产低估或收入延迟确认。


Image/Data Analysis(图片/数据分析)

图示箭头表示货物离开发货点即转移所有权,

  • 左侧为 Seller(发货仓库)→ 中间卡车(运输)→ 右侧 Buyer(目的地)。
  • 卡车上方标注“Ownership transferred here”。

财务影响:

  • 买方资产(Inventory)增加;
  • 卖方销售收入增加,同时减少库存。

Summary (总结)

  • FOB Shipping Point:发货即转移所有权。
  • 买方计入存货,卖方确认收入。
  • 符合风险与报酬转移的会计原则。

Slide 7-22 — Goods-in-Transit: FOB Destination

第7-22页——在途商品:目的地交货(FOB Destination)

Knowledge Points(知识点)

  • Transfer of Ownership under FOB Destination(目的地交货下的所有权转移)
  • Impact on Seller’s and Buyer’s Accounts(对买卖双方会计的影响)

Transfer of Ownership under FOB Destination(目的地交货下的所有权转移)

Explanation (解释):
Under FOB destination, ownership transfers to the buyer only when goods arrive at the buyer’s location.
在FOB目的地交货下,货物到达买方地点时所有权才转移。

Example (例子):
Company A ships goods to Company B on Dec 28 (FOB Destination), goods arrive Jan 3.
→ Goods still belong to Company A at Dec 31 year-end.

Extension (拓展):
This rule prevents premature revenue recognition and ensures the Matching Principle between sales and delivery.
该规则防止过早确认收入,符合配比原则


Impact on Seller’s and Buyer’s Accounts(对买卖双方会计的影响)

Explanation (解释):

  • Seller retains ownership and inventory until delivery.
  • Buyer records inventory only when goods are received.
    在目的地交货下,卖方在货物运输期间仍保留所有权,买方收到货后才入账。

Example (例子):

角色分录示例日期
Seller无销售确认,继续列示存货Dec 31
Buyer无存货确认,待货到后再入账Jan 3

Extension (拓展):
This timing difference affects year-end asset and income recognition, particularly when shipment and delivery span different fiscal periods.
若发货与到货跨期,会直接影响年末资产与收入的确认。


Image/Data Analysis(图片/数据分析)

图中箭头说明:

  • 货物仍在运输途中(卡车上标注“Ownership retained by seller”)。
  • 所有权直到“Destination Point”才转移。
  • Seller continues to bear shipping risk.

财务影响:

  • Seller 保留存货;Buyer 年末不确认资产。
  • Income recognition postponed until goods delivered.

Summary (总结)

  • FOB Destination:货到后才转移所有权。
  • 卖方继续列示存货,收入延迟确认。
  • 防止提前确认收入,保证报表真实性。

Slide 7-23 — Goods-in-Transit (Case Study)

第7-23页——在途商品案例分析

Knowledge Points(知识点)

  • Case: Timing of Ownership and Asset Reporting(案例:所有权与资产列示时点)
  • Policy Choice and Financial Impact(政策选择与财务影响)

Case: Timing of Ownership and Asset Reporting(案例:所有权与资产列示时点)

Explanation (解释):
XYZ Ltd. places an order on Dec 27, goods shipped Dec 28 (FOB Shipping Point), arrive Jan 3.
公司XYZ于12月27日下单,12月28日发货(FOB装运点),1月3日收货。

Example (例子):
At Dec 31 year-end:

  • Under FOB Shipping Point → XYZ reports goods as inventory.
  • Under FOB Destination → Seller reports goods as inventory.

Extension (拓展):
Choosing FOB Shipping Point increases assets and current ratio at year-end, affecting financial performance indicators.
采用装运点交货可在年末提升资产与流动比率,改变财务指标。


Policy Choice and Financial Impact(政策选择与财务影响)

Explanation (解释):
Accounting policy choice determines asset timing and revenue recognition.
不同会计政策影响资产与收入的确认时点。

Example (例子):
若公司想显示更强财务状况,可偏向采用FOB Shipping Point;
若追求稳健,可采用FOB Destination。

Extension (拓展):
However, accounting treatment must reflect economic substance, not management preference (Substance over Form Principle).
但必须遵守“实质重于形式原则”,避免通过会计政策操控利润。


Image/Data Analysis(图片/数据分析)

图示案例中时间轴:

  • 12/27 下单;12/28 发货;1/3 到货。
  • 上方分为两条路径:FOB Shipping Point 与 FOB Destination。
    右侧对比显示:
  • Shipping Point → Buyer includes in inventory;
  • Destination → Seller retains inventory。

Summary (总结)

  • 装运点交货:买方计入存货;目的地交货:卖方保留存货。
  • 会计政策影响资产与收入确认。
  • 应以经济实质为依据,而非管理动机。

Slide 7-24 — Inventory Cost Flow Assumptions

第7-24页——存货成本流转假设

Knowledge Points(知识点)

  • Concept of Cost Flow Assumptions(成本流转假设的概念)
  • Common Cost Flow Methods(常见的成本流转方法)

Concept of Cost Flow Assumptions(成本流转假设的概念)

Explanation (解释):
Cost flow assumptions describe how the cost of goods available for sale is allocated between ending inventory and cost of goods sold (COGS).
成本流转假设用于确定可供销售商品的成本如何在期末存货与销售成本之间分配。

Example (例子):
不同企业可采用不同假设,如先进先出法(FIFO)或加权平均法(Weighted Average),影响毛利与资产价值。

Extension (拓展):
Cost flow assumptions need not match the physical flow of goods; they are accounting conventions for consistent valuation.
成本流转假设不一定与实物流一致,而是用于会计计价的一种一致性方法。


Common Cost Flow Methods(常见的成本流转方法)

Explanation (解释):
The four primary methods are:

  1. Specific Identification(个别认定法)
  2. Weighted Average(加权平均法)
  3. First-In, First-Out (FIFO)(先进先出法)
  4. Last-In, First-Out (LIFO)(后进先出法)

Example (例子):
家具制造商可用Specific Identification;大型零售企业常用FIFO或加权平均法;LIFO多用于美国税务目的。

Extension (拓展):
Each method affects COGS, ending inventory, and income differently; consistent application is required per accounting standards.
不同方法会对成本、库存和利润造成不同影响,会计准则要求保持一致性。


Image/Data Analysis(图片/数据分析)

图中展示四个彩色方框:FIFO、LIFO、Weighted Average、Specific Identification。
箭头说明:不同方法 → 不同COGS & Ending Inventory。
文字强调:“Physical flow may differ from cost flow”。

财务影响:

  • FIFO → 较低COGS、较高利润。
  • LIFO → 较高COGS、较低利润。
  • Weighted Average → 平衡两者。

Summary (总结)

  • 成本流转假设决定COGS与存货的分配方式。
  • 四种常见方法:个别认定、加权平均、先进先出、后进先出。
  • 方法不同 → 利润、资产与税负不同。

Slide 7-25 — Specific Identification Method

第7-25页——个别认定法

Knowledge Points(知识点)

  • Definition and Concept(定义与原理)
  • Application Scenarios(适用情境)

Definition and Concept(定义与原理)

Explanation (解释):
The Specific Identification method directly assigns the actual cost of each specific item sold to COGS and keeps the remaining items’ actual cost in ending inventory.
个别认定法是将每件商品的实际成本直接分配到销售成本中,未售出的部分保留其实际成本作为期末存货。

Example (例子):
一家汽车经销商记录每辆车的购入成本:

  • 售出一辆成本为 30,000;
  • 未售出的两辆成本分别为 32,000 → Ending Inventory = $60,000。

Extension (拓展):
This method ensures perfect matching between revenue and actual cost but is only feasible when each item is unique or easily identifiable.
该方法能实现最精确的收入与成本配比,但仅适用于高价值、可单独识别的物品。


Application Scenarios(适用情境)

Explanation (解释):
Specific Identification is used for items that are expensive and individually tracked, such as jewelry, automobiles, fine art, and real estate.
该方法适用于单价高、可单独识别的商品,如珠宝、汽车、艺术品和房地产。

Example (例子):
一家珠宝店使用编号追踪每件钻戒的成本,售出时直接将该编号商品的成本计入COGS。

Extension (拓展):
Although accurate, it requires detailed recordkeeping and is impractical for high-volume homogeneous goods.
虽然精确,但记录复杂,不适用于大量同质商品。


Image/Data Analysis(图片/数据分析)

图示说明:

  • 左侧为多件具有编号的物品(#101、#102、#103)。
  • 售出的编号直接对应COGS;未售出的编号留在Inventory。
  • 底部标注:“Used only in a perpetual system for unique, high-value items”。

财务影响:

  • 成本与收入精确匹配。
  • 数据量大,操作成本高。

Summary (总结)

  • 个别认定法将每件商品的实际成本直接分配。
  • 精确但繁琐,仅用于高价、独特商品。
  • 实现了完美的收入-成本配比。

Slide 7-26 — FIFO, LIFO, and Weighted Average Overview

第7-26页——先进先出法、后进先出法与加权平均法概览

Knowledge Points(知识点)

  • Core Concept of FIFO, LIFO, Weighted Average(三种方法的核心理念)
  • Accounting vs. Physical Flow(会计流与实物流的区别)

Core Concept of FIFO, LIFO, Weighted Average(三种方法的核心理念)

Explanation (解释):
These methods determine which inventory costs are recognized in COGS and which remain in ending inventory.
这三种方法决定哪些库存成本计入销售成本,哪些留存为期末存货。

Example (例子):

  • FIFO:最早购入的成本先被核销。
  • LIFO:最新购入的成本先被核销。
  • Weighted Average:按平均单位成本计算。

Extension (拓展):
The choice of method affects reported profit, tax liability, and balance sheet valuation.
不同方法会影响利润、税负和资产负债表的库存价值。


Accounting vs. Physical Flow(会计流与实物流的区别)

Explanation (解释):
The accounting flow of costs does not have to match the physical movement of goods.
会计上的成本流转假设不必与实物流转相一致。

Example (例子):
超市货架商品实际按先进先出销售(实物流),但可用LIFO计算成本以减少税负。

Extension (拓展):
Choosing a cost flow method is an accounting policy decision, not an operational one.
成本流转方法的选择是会计政策决定,而非实际运营决策。


Image/Data Analysis(图片/数据分析)

图中展示三条箭头路径:

  • FIFO → Oldest Costs → COGS
  • LIFO → Recent Costs → COGS
  • Weighted Average → Average Costs → COGS
    文字提示:“The choice of cost flow assumption is not based on physical flow.

Summary (总结)

  • FIFO、LIFO、加权平均法是三大常用成本流转假设。
  • 会计成本流转可不同于实物流转。
  • 方法选择影响利润与税收。

Slide 7-27 — Inventory Data for Cost Flow Illustration

第7-27页——存货成本流转假设示例数据

Knowledge Points(知识点)

  • Data Set for Cost Flow Illustration(成本流转示例的基础数据)
  • Goods Available for Sale(可供销售商品的结构)

Data Set for Cost Flow Illustration(成本流转示例的基础数据)

Explanation (解释):
The following data summarize inventory transactions during the month, used for illustrating FIFO, LIFO, and Weighted Average.
以下数据总结了一个月内的进销情况,用于演示FIFO、LIFO与加权平均法的计算过程。

Example (例子):

日期事项数量(单位)单价金额
期初存货 100件$6$600
1/2采购 200件$7$1,400
1/5销售 150件
1/10采购 300件$10$3,000
1/15销售 250件
1/30采购 50件$11$550

Extension (拓展):
These data create a total of 650 units available for sale and 400 units sold, leaving 250 units in ending inventory.
本期共有650单位可供销售,其中售出400单位,期末剩余250单位。


Goods Available for Sale(可供销售商品的结构)

Explanation (解释):
Total cost of goods available = 5,550,需在销售成本与期末存货间分配。

Example (例子):

  • FIFO → 新成本留存,旧成本计入COGS。
  • LIFO → 旧成本留存,新成本计入COGS。
  • Weighted Average → 计算加权平均单价。

Extension (拓展):
Different methods result in varying gross profits though total cost remains the same.
虽然总成本不变,但不同方法会导致毛利差异。


Image/Data Analysis(图片/数据分析)

表格与时间线并列展示:

  • 蓝色箭头向右(采购);红色箭头向左(销售)。
  • 下方数字:Beginning Inv. + Purchases = 650 units, Cost $5,550。
  • 标注:“Ending Inv. = 250 units”。

Summary (总结)

  • 本页提供FIFO/LIFO示例的基础数据。
  • 可供销售总额 = $5,550(650单位)。
  • 不同假设影响COGS与期末存货分配。

Slide 7-28 — FIFO (First-In, First-Out) Method

第7-28页——先进先出法(FIFO)

Knowledge Points(知识点)

  • FIFO Principle(先进先出原理)
  • Financial Impact under Inflation(通胀时期的财务影响)

FIFO Principle(先进先出原理)

Explanation (解释):
Under FIFO, the earliest purchased goods are considered sold first; the latest costs remain in ending inventory.
在先进先出法下,最早购入的商品视为最先售出,最新购入的商品留在期末存货中。

Example (例子):
从上述数据中:售出400单位 → 来自最早的采购批次。
因此期末存货250单位来自最新批次(11)。

Extension (拓展):
This method approximates the physical flow for many industries, particularly where products are perishable or time-sensitive.
该方法常用于实物流先进先出的行业,如食品、医药或日用品。


Financial Impact under Inflation(通胀时期的财务影响)

Explanation (解释):
During inflation, FIFO results in lower COGS (using older, cheaper costs) and higher ending inventory and net income.
在通胀期间,FIFO 会导致销售成本较低(使用早期低价成本),存货与净利润较高。

Example (例子):
若成本由 11 上升:FIFO 会使用早期低价库存计算COGS,从而提升毛利。

Extension (拓展):
Although it increases taxable income, it presents a stronger balance sheet position due to higher asset valuation.
虽然税负较高,但资产负债表中的存货价值更高,反映企业更稳健的财务状况。


Image/Data Analysis(图片/数据分析)

图中展示两层箭头:

  • 上层(Oldest → Sold)表示旧成本进入COGS;
  • 下层(Newest → Remain)表示新成本留在库存。
    旁注:“Old costs → COGS; New costs → Ending Inventory”。

Summary (总结)

  • FIFO:旧货先出,新货留存。
  • 通胀期 → 低成本COGS + 高利润 + 高资产。
  • 符合多数行业的实际物流特征。

Slide 7-29 — FIFO: Periodic Inventory System

第7-29页——先进先出法:定期盘存制

Knowledge Points(知识点)

  • FIFO Calculation under Periodic System(定期盘存制下的FIFO计算)
  • Relationship between COGS and Ending Inventory(销售成本与期末存货的关系)

FIFO Calculation under Periodic System(定期盘存制下的FIFO计算)

Explanation (解释):
Under the periodic system, FIFO assumes that the oldest purchases are sold first, regardless of when sales occur.
在定期盘存制下,FIFO假设最早购入的存货优先售出,与销售时间无关。

Example (例子):
基于前页数据:

  • Ending Inventory = 250 units(最新采购的批次)
    • 50 × 550
    • 200 × 2,000
      → Ending Inventory = $2,550
  • COGS = 2,550 = $3,000

Extension (拓展):
FIFO periodic simplifies the computation by focusing only on total quantities, not transaction timing.
定期FIFO不考虑销售顺序,仅以期末数量反推库存成本,计算简便。


Relationship between COGS and Ending Inventory(销售成本与期末存货的关系)

Explanation (解释):
Ending Inventory uses the most recent costs; COGS uses older costs.
期末存货采用最新进货成本,COGS采用最早进货成本。

Example (例子):
COGS = (100 × 7) + (100 × 3,000。

Extension (拓展):
FIFO ensures inventory on the balance sheet reflects near-current costs, enhancing asset relevance.
FIFO能使资产负债表中的存货更接近当前市场成本,提升报表的相关性。


Image/Data Analysis(图片/数据分析)

图表分两部分:

  • “COGS”:使用最早批次(7)的成本。
  • “Ending Inventory”:使用最新批次(11)的成本。
    结论框:Ending Inv. = 3,000。

Summary (总结)

  • 定期FIFO通过期末库存数量反推成本。
  • Ending Inv. 采用新成本;COGS 采用旧成本。
  • 通胀期下利润上升,资产反映当期价值。

Slide 7-30 — FIFO: Perpetual Inventory System

第7-30页——先进先出法:永续盘存制

Knowledge Points(知识点)

  • FIFO Perpetual Process(永续盘存制下的FIFO流程)
  • Comparison with Periodic FIFO(与定期盘存制的对比)

FIFO Perpetual Process(永续盘存制下的FIFO流程)

Explanation (解释):
In perpetual FIFO, the oldest costs are removed from inventory and recorded in COGS at the time of each sale.
在永续盘存制下,每次销售发生时,系统会即时将最早的成本转入销售成本(COGS)。

Example (例子):

Sale #1 (150 units):
100 × 7 = $950

Sale #2 (250 units):
150 × 10 = $3,000

Ending Inventory:
200 × 11 = $2,550

COGS = 3,000 = $3,950

Extension (拓展):
Perpetual FIFO updates inventory continuously and provides more precise timing of cost recognition.
永续FIFO能持续更新库存,提供更准确的成本确认时点。


Comparison with Periodic FIFO(与定期盘存制的对比)

Explanation (解释):
Under FIFO, both perpetual and periodic systems produce the same ending inventory but may differ slightly in intermediate transaction tracking.
两种系统在FIFO下期末结果一致,但交易期间的跟踪方式不同。

Example (例子):
Both yield Ending Inventory = 3,000(若假设销售同日发生)。

Extension (拓展):
FIFO remains consistent across systems, reinforcing its reliability and comparability across reporting methods.
FIFO在不同制度下结果一致,提高了财务信息的可比性。


Image/Data Analysis(图片/数据分析)

图中展示两次销售事件的库存减少:

  • Sale 1:减少旧库存(7)。
  • Sale 2:继续使用剩余旧成本。
    箭头指向“COGS updated after each sale”,说明实时更新。

Summary (总结)

  • 永续FIFO每笔销售即时更新COGS与存货。
  • 与定期FIFO结果相同,但信息更即时。
  • 提升管理层对利润与库存的实时掌握。

Slide 7-31 — LIFO (Last-In, First-Out) Method

第7-31页——后进先出法(LIFO)

Knowledge Points(知识点)

  • LIFO Principle(后进先出原理)
  • Financial Impact under Inflation(通胀环境下的财务影响)

LIFO Principle(后进先出原理)

Explanation (解释):
Under LIFO, the most recently purchased goods are assumed to be sold first, while older goods remain in ending inventory.
在LIFO下,最新购入的存货被视为最先售出,早期购入的存货留在期末库存中。

Example (例子):
若成本依次为 7, 11:
则售出部分采用最新成本 11 计算,旧成本 7 留在库存中。

Extension (拓展):
LIFO better matches current costs with current revenues, especially during inflation.
LIFO在通胀环境下能更好地将当期成本与当期收入配比。


Financial Impact under Inflation(通胀环境下的财务影响)

Explanation (解释):
In inflationary periods, LIFO yields higher COGS and lower net income because the latest, higher costs are expensed first.
在通货膨胀时期,LIFO因采用最新高价成本,会导致COGS较高、净利润较低。

Example (例子):
若成本从 11:
FIFO COGS ≈ 3,500 → 净利润较低。

Extension (拓展):
LIFO reduces taxable income but understates inventory values on the balance sheet.
LIFO可减少税负,但会低估资产负债表中的库存价值。


Image/Data Analysis(图片/数据分析)

图示反向箭头:

  • 上层“Recent Costs → COGS”;
  • 下层“Older Costs → Ending Inventory”。
    标注:“LIFO matches current costs with current revenues.

财务效果图:

  • COGS 上升;
  • 利润下降;
  • 税负下降。

Summary (总结)

  • LIFO:最新成本计入COGS,旧成本留在库存。
  • 通胀期 → 高COGS、低利润、低税负。
  • 提高配比性但降低资产账面价值。

Slide 7-32 — LIFO: Periodic vs. Perpetual

第7-32页——LIFO在定期与永续盘存制下的比较

Knowledge Points(知识点)

  • Difference between Periodic and Perpetual LIFO(定期与永续LIFO的差异)
  • Consistency and Reporting Implications(一致性与报告影响)

Difference between Periodic and Perpetual LIFO(定期与永续LIFO的差异)

Explanation (解释):
Unlike FIFO, LIFO may produce different results under periodic and perpetual systems because the timing of sales affects which layers of costs are used.
与FIFO不同,LIFO在定期与永续盘存制下可能产生不同结果,因为销售时间会影响使用的成本层。

Example (例子):
若全年多次采购:

  • 定期LIFO:仅在年末统一计算COGS,使用最后的采购批次成本。
  • 永续LIFO:每次销售时即时使用当时最新的成本层。

Extension (拓展):
Perpetual LIFO reflects cost changes more accurately during the year but requires complex tracking systems.
永续LIFO能更精确反映年内成本变化,但操作复杂、记录量大。


Consistency and Reporting Implications(一致性与报告影响)

Explanation (解释):
Accounting standards require consistency in applying inventory methods across periods to ensure comparability.
会计准则要求各期存货计价方法保持一致,以确保财务报表可比性。

Example (例子):
企业若采用LIFO,不得随意改为FIFO;如更改,须在附注中披露影响。

Extension (拓展):
Changes in method affect both COGS and retained earnings; transparent disclosure prevents earnings manipulation.
方法变更会影响利润与留存收益,披露透明可防止操纵利润。


Image/Data Analysis(图片/数据分析)

图表比较两种制度:

特征定期LIFO永续LIFO
成本层使用时点年末统一计算每次销售时更新
精确性较低较高
操作复杂度简单
COGS结果可能不同实时变化

图右侧标注:“Periodic LIFO ≠ Perpetual LIFO”。


Summary (总结)

  • LIFO在定期与永续制下结果可能不同。
  • 永续制更精确但更复杂。
  • 方法需保持一致并披露变更影响。

Slide 7-33 — Case 3: LIFO – Periodic Inventory System

第7-33页——案例3:后进先出法(定期盘存制)

Knowledge Points(知识点)

  • LIFO under Periodic System(定期盘存制下的LIFO计算)
  • Effect on Ending Inventory and COGS(期末存货与销售成本的影响)

LIFO under Periodic System(定期盘存制下的LIFO计算)

Explanation (解释):
In the periodic system, LIFO assumes that the most recently purchased goods are sold first. Ending inventory is composed of the oldest units.
在定期盘存制下,LIFO假设最新购入的商品最先售出,因此期末库存由最早批次组成。

Example (例子):
根据数据:

  • Ending Inventory = 250 units

    • 100 × 600
    • 150 × 1,050
      → Ending Inventory = $1,650
  • COGS = 50×10 + 50×4,900**
    (或总成本 1,650 = $3,900)

Extension (拓展):
Periodic LIFO aggregates all transactions and applies cost layers only at period-end, which simplifies daily recording but delays cost accuracy.
定期LIFO在期末统一应用成本层次,简化日常记录但推迟成本确认的准确性。


Effect on Ending Inventory and COGS(期末存货与销售成本的影响)

Explanation (解释):
Ending inventory reflects older, lower costs; COGS reflects newer, higher costs.
期末库存包含旧成本,COGS包含最新的高成本。

Example (例子):
COGS较高 → 净利润下降。

Extension (拓展):
LIFO under periodic systems matches current sales prices with recent costs, improving income statement relevance.
定期LIFO能将当期销售价格与近期成本配比,提高利润表的相关性。


Image/Data Analysis(图片/数据分析)

图表说明:

  • 期末存货 250 单位来自最早批次(7)。
  • 销售成本来自最新批次(10)。
  • 箭头标注:“New costs → COGS; Old costs → Inventory”。

Summary (总结)

  • 定期LIFO假设最新进货先售出。
  • 期末存货为旧成本,COGS为新成本。
  • 提高利润配比性但降低账面利润。

Slide 7-34 — Case 4: LIFO – Perpetual Inventory System

第7-34页——案例4:后进先出法(永续盘存制)

Knowledge Points(知识点)

  • LIFO under Perpetual System(永续盘存制下的LIFO计算)
  • Comparison with Periodic LIFO(与定期制的对比)

LIFO under Perpetual System(永续盘存制下的LIFO计算)

Explanation (解释):
Under the perpetual system, COGS is updated continuously. Each sale uses the most recent cost available at that point in time.
在永续盘存制下,每笔销售发生时即时使用最新的成本层更新COGS。

Example (例子):

  • Sale #1 (150 units):
    150 × 1,050

  • Sale #2 (250 units):
    250 × 2,500

  • Ending Inventory:
    (100×7) + (50×11) = $2,650

Extension (拓展):
Perpetual LIFO better reflects cost fluctuations during the period but demands precise tracking of each transaction.
永续LIFO能更准确反映期间成本波动,但要求逐笔记录交易,操作较复杂。


Comparison with Periodic LIFO(与定期制的对比)

Explanation (解释):
Under LIFO, perpetual and periodic systems may yield different results, though in some stable cases (few transactions) they coincide.
在LIFO下,永续与定期制结果可能不同,但若交易较少则结果相同。

Example (例子):
在此案例中,系统结果一致,因销售与进货层次重叠不多。

Extension (拓展):
Consistency across systems improves data comparability, though most firms use either perpetual LIFO (for control) or periodic (for simplicity).
保持制度一致性可提高数据可比性,企业可根据管理需求选择制度类型。


Image/Data Analysis(图片/数据分析)

图表展示两次销售:

  • Sale #1 使用 $7 成本层;
  • Sale #2 使用 $10 成本层。
    右侧箭头:“COGS updated after each sale”。
    底部注解:“Periodic ≈ Perpetual (in this example)”。

Summary (总结)

  • 永续LIFO实时更新COGS。
  • 与定期LIFO结果可能一致或略有差异。
  • 能反映当期价格波动,但操作复杂。

Slide 7-35 — Average Cost Method

第7-35页——加权平均法(Weighted Average Method)

Knowledge Points(知识点)

  • Principle of Average Cost(平均成本法原理)
  • Formula and Application(公式与应用)

Principle of Average Cost(平均成本法原理)

Explanation (解释):
The average cost method assigns the same cost per unit to all items by dividing total cost of goods available for sale by total units available.
加权平均法通过将可供销售商品的总成本除以总数量,为所有单位分配相同的平均单位成本。

Example (例子):
若总成本为 5,550 ÷ 650 = $8.54/单位

Extension (拓展):
This method smooths cost fluctuations, reducing the impact of price volatility on COGS and income.
加权平均法能平滑价格波动对COGS和利润的影响,使利润更稳定。


Formula and Application(公式与应用)

Explanation (解释):

Example (例子):
COGS = 400 × 3,416
Ending Inventory = 250 × 2,135

Extension (拓展):
Applied mainly under the periodic system; perpetual systems use a moving-average variation recalculated after each purchase.
通常用于定期盘存制;永续制采用移动平均法,每次采购后重新计算平均成本。


Image/Data Analysis(图片/数据分析)

图中左侧显示公式:
COGS ÷ Units = Average Cost per Unit
右侧图像展示一人扛着沉重“成本”箱,象征将所有成本平均分配。


Summary (总结)

  • 平均成本法通过平滑价格波动稳定利润。
  • 平均单价 = 总成本 ÷ 总数量。
  • 永续制下使用“移动平均法”变体。

Slide 7-36 — Summary of Inventory Cost Flow Assumptions

第7-36页——存货成本流转假设汇总

Knowledge Points(知识点)

  • Summary of Key Data(关键数据回顾)
  • Comparison among FIFO, LIFO, and Average(FIFO、LIFO与平均法比较)

Summary of Key Data(关键数据回顾)

Explanation (解释):
This table consolidates inventory activity used for illustrating all cost flow methods.
此表总结了之前所有用于说明成本流转假设的存货活动数据。

Example (例子):
总可供销售单位数 = 650
总成本 = $5,550
销售数量 = 400
期末库存数量 = 250

Extension (拓展):
These figures form the baseline for analyzing how different methods allocate cost between COGS and ending inventory.
这些数据构成分析不同方法如何在COGS与期末存货间分配成本的基础。


Comparison among FIFO, LIFO, and Average(FIFO、LIFO与平均法比较)

Explanation (解释):
All methods use the same total cost and total units but differ in cost allocation.
三种方法的总成本与总单位数相同,但成本分配不同。

Example (例子):

方法COGSEnding Inv.特征
FIFO高利润,高税负
LIFO低利润,低税负
平均法中等中等平滑波动

Extension (拓展):
Choice of method depends on management goals — tax minimization (LIFO) vs. financial reporting strength (FIFO).
方法选择取决于企业目标:若想降低税负选LIFO,若想提高账面实力选FIFO。


Image/Data Analysis(图片/数据分析)

图表显示同一数据集在三种方法下的不同结果:

  • FIFO → Ending Inventory高;
  • LIFO → COGS高;
  • Average → 结果居中。
    底部注释:“Total Cost = $5,550; Ending Units = 250”。

Summary (总结)

  • 所有方法基于相同数据但成本分配不同。
  • FIFO → 高利润;LIFO → 低利润;Average → 稳定利润。
  • 方法选择影响税收、利润与资产报告。

Slide 7-37 — Case 5: Weighted Average – Periodic

第7-37页——案例5:加权平均法(定期盘存制)

Knowledge Points(知识点)

  • Simple Weighted Average Formula(简单加权平均公式)
  • Calculation of Ending Inventory and COGS(期末存货与销售成本的计算)

Simple Weighted Average Formula(简单加权平均公式)

Explanation (解释):
Under the periodic system, a single weighted-average cost per unit is computed for all goods available for sale.
在定期盘存制下,企业通过计算可供销售商品的加权平均单位成本,作为期末库存和销售成本的基础。

Example (例子):
公式如下:

根据题中数据:
8.54/unit**

Extension (拓展):
The weighted average method assumes all goods are indistinguishable in cost; every item has the same unit cost.
加权平均法假设所有商品成本相同,每件商品按平均单价计价,简化计算。


Calculation of Ending Inventory and COGS(期末存货与销售成本的计算)

Explanation (解释):
Using the calculated average unit cost, the cost of ending inventory and COGS can be determined proportionally.
利用平均单位成本,可按比例计算期末存货与COGS。

Example (例子):

  • Ending Inventory = 250 × 2,135**
  • COGS = 400 × 3,416**

Extension (拓展):
This method stabilizes profit levels and minimizes the effects of price fluctuations across accounting periods.
加权平均法可平滑利润波动,减轻价格波动对业绩的影响。


Image/Data Analysis(图片/数据分析)

图中黄色框强调公式:
8.54/unit
并展示了:

  • Ending Inv. = 250 × 2,135
  • COGS = 400 × 3,416
    右下角备注:“Physical flow of goods remains the same
    即实物流转不受计价方法影响。

Summary (总结)

  • 加权平均法为所有商品分配统一的平均成本。
  • 期末库存与COGS按平均单价计算。
  • 平滑价格波动对利润的影响。

Slide 7-38 — Case 6: Weighted Average – Perpetual

第7-38页——案例6:加权平均法(永续盘存制)

Knowledge Points(知识点)

  • Moving Average Concept(移动平均概念)
  • Adjustment after Each Purchase(每次采购后的调整)

Moving Average Concept(移动平均概念)

Explanation (解释):
In the perpetual system, the weighted average unit cost is recalculated after each purchase to reflect the new mix of costs.
在永续盘存制下,每次采购后都重新计算新的加权平均单位成本,以反映库存成本结构变化。

Example (例子):
平均单价 = 可供销售总成本 ÷ 可供销售总数量
每次销售时使用当时最新的平均成本计算COGS。

Extension (拓展):
The moving average method provides more accurate real-time cost information compared with the simple periodic average.
移动平均法比定期加权平均法更能反映实时成本变化,提高决策的及时性。


Adjustment after Each Purchase(每次采购后的调整)

Explanation (解释):
The new average is applied until the next purchase occurs, when it will again be updated.
每次采购发生后更新平均单价,直至下一次采购。

Example (例子):
若当前平均成本为10,则新平均成本重新计算。

Extension (拓展):
This approach suits businesses with frequent inventory changes (e.g., supermarkets, electronics retailers).
适用于库存频繁变动的企业,如超市或电子产品零售商。


Image/Data Analysis(图片/数据分析)

图中要点:

  • 箭头表示每次采购后更新“Average Cost per Unit”。
  • 下方说明:“Apply formula after each purchase to revalue inventory”。
    即每次进货后需重新评估库存价值。

Summary (总结)

  • 永续加权平均法每次采购后更新平均成本。
  • 提供实时成本与利润信息。
  • 适用于交易频繁的企业。

Slide 7-39 — Inventory Cost Flow Assumptions (Recap Table)

第7-39页——存货成本流转假设回顾表

Knowledge Points(知识点)

  • Base Data Recap(基础数据回顾)
  • Uniform Application of Cost Flow(成本流转的统一应用)

Base Data Recap(基础数据回顾)

Explanation (解释):
This table repeats the same inventory data used across FIFO, LIFO, and Average cases for consistency in comparison.
该表重复了所有FIFO、LIFO和平均法计算所用的原始数据,保证结果可比。

Example (例子):

  • Beginning Inv. = 100 @ $6
  • Purchases: 200 @ 10; 50 @ $11
  • Total = 650 units, Cost = $5,550
  • Sales = 400 units → Ending Inv. = 250 units

Extension (拓展):
All methods apply to the same data, but yield different inventory valuations and COGS.
三种方法基于相同数据,但计算结果不同。


Uniform Application of Cost Flow(成本流转的统一应用)

Explanation (解释):
Although physical goods flow identically, accounting cost flow varies depending on the chosen assumption.
尽管实物流转相同,但会计成本流转因假设不同而异。

Example (例子):

  • FIFO: Oldest cost to COGS
  • LIFO: Newest cost to COGS
  • Average: Even cost per unit

Extension (拓展):
These assumptions help balance between accuracy, simplicity, and tax impact.
不同假设能在准确性、简便性与税务影响之间取得平衡。


Image/Data Analysis(图片/数据分析)

表格显示相同交易:

  • 期初100件 × $6
  • 三次采购合计650件,共$5,550。
    底部说明:“Ending Inventory = 250 units regardless of assumption.
    即库存数量不变,但成本分配不同。

Summary (总结)

  • 相同库存数据可用于不同成本法比较。
  • 实物流不变,会计流转不同。
  • 方法影响资产估值与利润表现。

Slide 7-40 — Case 6: Weighted Average – Perpetual (Detailed Calculation)

第7-40页——案例6:永续加权平均法(详细计算)

Knowledge Points(知识点)

  • Step-by-Step Moving Average Calculation(移动平均逐步计算)
  • Impact on COGS and Ending Inventory(对COGS与期末存货的影响)

Step-by-Step Moving Average Calculation(移动平均逐步计算)

Explanation (解释):
Each sale triggers a recalculation of the average cost per unit based on remaining inventory and new purchases.
每次销售后根据剩余存货与新采购重新计算平均单位成本。

Example (例子):

Sale #1 (150 units):
平均单价 = (100×7) ÷ (100+200) = **6.67 = $1,000

Sale #2 (250 units):
新平均单价 = (剩余库存 + 新采购)
= [(100×6 + 200×7 − 150×6.67 + 300×10) ÷ (450)] = **8.89 = $2,222

Ending Inventory:
平均单价 = **9.31 = $2,328

Extension (拓展):
Moving average reflects dynamic cost adjustments and aligns more closely with real-time market prices.
移动平均法反映动态成本调整,更贴近实际市场价格。


Impact on COGS and Ending Inventory(对COGS与期末存货的影响)

Explanation (解释):
Each recalculation changes both COGS and the valuation of remaining inventory.
每次重新计算都会影响COGS与剩余存货的估值。

Example (例子):

  • 价格上升时 → 平均单价上升 → COGS 增加 → 利润下降。
  • 价格下降时 → 平均单价下降 → COGS 减少 → 利润上升。

Extension (拓展):
Provides a compromise between FIFO (high profit) and LIFO (low profit), offering stable and realistic results.
永续加权平均法在FIFO与LIFO之间取得平衡,结果更稳定、更现实。


Image/Data Analysis(图片/数据分析)

图中演示三步计算:
1 Sale #1 → 平均6.67 2 Sale #2 → 平均8.89
3 Ending Inv → 平均$9.31
右下标注:“Average cost changes after each purchase”。


Summary (总结)

  • 永续加权平均法动态更新单位成本。
  • 反映市场价格变化,平衡利润与成本。
  • 提供稳定、可比的成本与利润数据。

Slide 7-41 — Effect on Net Income

第7-41页——对净利润的影响

Knowledge Points(知识点)

  • Relationship between Cost Flow and Net Income(成本流转假设与净利润的关系)
  • Tax Rate and Operating Expense Context(税率与营业费用的背景设定)

Relationship between Cost Flow and Net Income(成本流转假设与净利润的关系)

Explanation (解释):
Different inventory costing methods (FIFO, LIFO, Average) lead to different COGS, affecting gross profit and ultimately net income.
不同的存货计价方法(FIFO、LIFO、平均法)导致不同的销售成本(COGS),从而影响毛利与净利润。

Example (例子):
题设假定:

  • 销售收入 (Sales) = $10,000
  • 营业费用 (Operating Expenses) = $2,000
  • 所得税率 (Tax Rate) = 30%

Extension (拓展):
Since taxes depend on reported income, inventory methods indirectly affect tax liabilities and management strategy.
由于税额取决于利润水平,因此存货计价方法会间接影响企业的税负与管理决策。


Tax Rate and Operating Expense Context(税率与营业费用的背景设定)

Explanation (解释):
Operating expenses remain constant across methods; only COGS changes, altering the taxable income base.
在不同成本法下,营业费用保持不变;仅COGS的不同导致应税所得基数不同。

Example (例子):
若LIFO的COGS较高 → 毛利较低 → 应税收入减少。

Extension (拓展):
Managers may choose a method depending on whether they aim to minimize taxes (LIFO) or maximize reported income (FIFO).
管理层可根据目标选择方法:若要减少税负选LIFO;若要提升报表利润选FIFO。


Image/Data Analysis(图片/数据分析)

图中仅显示假设条件:
Sales = 2,000, Tax rate = 30%
箭头指向“Net Income”,提示不同方法下净利润差异。


Summary (总结)

  • 不同成本流转法通过COGS影响净利润。
  • 税率固定但应税所得随方法变化。
  • 管理层可根据税负或利润目标选择方法。

Slide 7-42 — Effect Comparison under Periodic Inventory System

第7-42页——定期盘存制下各方法的净利润比较

Knowledge Points(知识点)

  • Comparative Income Effects of FIFO, LIFO, and Average(FIFO、LIFO与平均法的收益差异)
  • Managerial and Tax Implications(管理与税务意义)

Comparative Income Effects of FIFO, LIFO, and Average(FIFO、LIFO与平均法的收益差异)

Explanation (解释):
Each method produces different COGS and thus different levels of gross profit and net income under the same sales and expense conditions.
在相同销售与费用条件下,各方法产生不同的销售成本,从而导致毛利与净利润差异。

Example (例子):

MethodSalesCOGSGross MarginOper. Exp.IncomeTax (30%)Net Income
FIFO10,0003,0007,0002,0005,0001,5003,500
LIFO10,0003,9006,1002,0004,1001,2302,870
Avg.10,0003,4166,5842,0004,5841,3753,209

Extension (拓展):
FIFO yields highest net income and taxes; LIFO yields lowest both; Average falls in between.
FIFO带来最高的净利润与税负;LIFO最低;平均法介于两者之间。


Managerial and Tax Implications(管理与税务意义)

Explanation (解释):
Managers prefer high profits for reporting (FIFO), but shareholders prefer lower tax payments (LIFO).
管理层倾向选择能提升利润的FIFO,而股东可能更希望采用LIFO以减少税费支出。

Example (例子):
若公司想吸引投资者 → 报告高利润(FIFO)。
若目标是节税 → 报告低利润(LIFO)。

Extension (拓展):
This trade-off highlights the strategic role of accounting policy choices in financial performance presentation.
此差异体现了会计政策选择在财务表现中的战略意义。


Image/Data Analysis(图片/数据分析)

图表突出显示黄色区域:

  • COGS差异 (FIFO最低、LIFO最高)
  • 净利润对应变化:3,500 → 2,870 → 3,209。
    下方问题提示思考:

Which net income number will management want to report?
Which tax bill will shareholders want management to pay?


Summary (总结)

  • FIFO利润最高但税负大;LIFO利润最低税负低。
  • 平均法结果居中,适合平衡策略。
  • 方法选择反映公司报告与税务策略的权衡。

Slide 7-43 — Overview of Inventory Costing Methods

第7-43页——存货计价方法总览

Knowledge Points(知识点)

  • Four Common Costing Methods(四种常见计价方法)
  • Application Scenarios(各方法适用情境)

Four Common Costing Methods(四种常见计价方法)

Explanation (解释):
The four principal inventory costing methods are:
1 Specific Identification(个别认定法)
2 FIFO(先进先出法)
3 LIFO(后进先出法)
4 Weighted Average(加权平均法)

Example (例子):

  • Specific Identification: 高价值、可区分商品(珠宝、汽车)
  • FIFO: 适合货品流动快、价格波动明显的行业
  • LIFO: 通胀时期有助于减轻税负
  • Weighted Average: 平滑价格波动

Extension (拓展):
Each method serves different objectives—accuracy (specific), inflation protection (LIFO), or simplicity (average).
每种方法服务于不同目标:精确性(个别认定)、抗通胀性(LIFO)或简便性(平均法)。


Application Scenarios(各方法适用情境)

Explanation (解释):
Choice depends on business type, market volatility, and management objectives.
选择依据企业性质、价格波动程度与管理目标。

Example (例子):
零售业倾向FIFO;制造业常用平均法;美国企业偏好LIFO以节税。

Extension (拓展):
GAAP允许使用多种方法,但需保持一致性和披露变更影响。
会计准则允许企业选择不同方法,但需保持一致并披露变更影响。


Image/Data Analysis(图片/数据分析)

图像为四向箭头:

  • 左上:Specific Identification
  • 右上:FIFO
  • 左下:LIFO
  • 右下:Weighted Average
    象征四种方法汇聚于“Inventory Costing Methods”核心。

Summary (总结)

  • 四种存货计价方法各具特点。
  • 适用方法取决于行业特征与管理目标。
  • 一致性原则要求方法一旦选用,应持续使用。

Slide 7-44 — Conceptual Framework of Cost Allocation

第7-44页——存货成本分配框架

Knowledge Points(知识点)

  • Relationship between Total Cost, Ending Inventory, and COGS(总成本、期末库存与销售成本的关系)
  • The Role of Inventory Costing Method(存货计价方法的作用)

Relationship between Total Cost, Ending Inventory, and COGS(总成本、期末库存与销售成本的关系)

Explanation (解释):
Total cost of goods available for sale is allocated between COGS and ending inventory.
可供销售商品的总成本在销售成本与期末库存之间分配。

Example (例子):
总成本 $5,550 = COGS + 期末存货成本
不同方法影响两者比例,但总额不变。

Extension (拓展):
This allocation determines both reported profit (via COGS) and asset value (via inventory).
这种分配决定了利润表中的利润水平和资产负债表中的存货价值。


The Role of Inventory Costing Method(存货计价方法的作用)

Explanation (解释):
The chosen method determines how costs are split between these two accounts.
存货计价方法决定了成本如何在销售成本与期末存货之间分配。

Example (例子):
FIFO → 较多成本留在期末存货
LIFO → 较多成本计入COGS
Average → 成本平均分配

Extension (拓展):
Understanding this linkage helps managers interpret profitability trends and evaluate tax implications.
理解这种关系有助于管理层分析利润趋势与税务影响。


Image/Data Analysis(图片/数据分析)

图中展示:
顶部为绿色框“Total Dollar Amount of Goods Available for Sale”,
下方分为两支箭头:

  • 左:Ending Inventory
  • 右:Cost of Goods Sold
    中间椭圆为“Inventory Costing Method”,表示分配机制。

Summary (总结)

  • 总成本在COGS与期末库存之间分配。
  • 计价方法决定分配比例与利润表现。
  • 理解分配机制是财务分析的基础。

Slide 7-45 — Financial Statement Effects of Costing Methods

第7-45页——不同计价方法对财务报表的影响

Knowledge Points(知识点)

  • Comparative Advantages of FIFO, LIFO, and Weighted Average(各方法的比较优势)
  • Impact on Ending Inventory and COGS(对期末存货与COGS的影响)

Comparative Advantages of FIFO, LIFO, and Weighted Average(各方法的比较优势)

Explanation (解释):
Each costing method provides unique benefits depending on management goals and market conditions.
不同的存货计价方法根据管理目标和市场条件各有优点。

MethodKey Advantage中文优势描述
FIFOEnding inventory approximates current replacement cost期末库存接近当前重置成本
LIFOBetter matches current costs in COGS with revenues销售成本更好地反映当前价格水平
Weighted AverageSmoothes out price changes平滑价格波动的影响

Example (例子):
当价格持续上升:

  • FIFO → 高存货价值、低COGS → 高利润
  • LIFO → 低存货价值、高COGS → 低利润
  • 平均法 → 成本介于两者之间

Extension (拓展):
In periods of inflation, FIFO shows higher net income (good for investors), while LIFO reduces taxes (good for cash flow).
在通货膨胀时期,FIFO显示较高利润(对投资者友好),而LIFO有助于减轻税负(改善现金流)。


Impact on Ending Inventory and COGS(对期末存货与COGS的影响)

Explanation (解释):
Because each method allocates costs differently, the same total cost of goods available for sale produces different inventory valuations.
由于成本分配方式不同,相同的可供销售商品成本会产生不同的库存价值与COGS。

Example (例子):
总成本 = $5,550

  • FIFO → 期末库存高 → 资产负债表强劲
  • LIFO → 期末库存低 → 减轻税收负担

Extension (拓展):
Choosing among methods is a balance between accurate reporting (FIFO) and tax efficiency (LIFO).
企业选择方法时需在报表展示与税务优化之间平衡。


Image/Data Analysis(图片/数据分析)

图中展示三个矩形框:

  • FIFO: Ending inventory ≈ current replacement cost
  • LIFO: Matches current cost to revenue
  • Weighted Average: Smoothes price changes
    上方标题“Advantages of Methods”突出三者优势差异。

Summary (总结)

  • FIFO反映资产真实价值;LIFO提高成本配比性;平均法平滑价格波动。
  • 选择方法需兼顾利润、税务与信息稳定性。

Slide 7-46 — Deciding When Different Methods Are Beneficial

第7-46页——不同存货计价方法的适用情境

Knowledge Points(知识点)

  • Decision Context(决策情境)
  • Benefit Criteria(收益判断标准)

Decision Context(决策情境)

Explanation (解释):
Firms should select inventory methods that best serve their financial reporting objectives and economic environment.
企业应根据财务报告目标与经济环境选择合适的存货计价方法。

Example (例子):
在通胀期:LIFO可降低应税利润;
在通缩或成本下降期:FIFO可提升账面利润。

Extension (拓展):
For multinational corporations, differences in tax laws may lead to adopting multiple methods across subsidiaries.
跨国公司可能因不同国家税制差异,在子公司间使用不同方法。


Benefit Criteria(收益判断标准)

Explanation (解释):
A method is beneficial when it aligns with management’s goals—profit maximization, tax minimization, or investor confidence.
当存货计价方法与企业目标一致时,其应用才具有战略意义。

Example (例子):
若公司准备融资或上市 → FIFO提升净资产;
若公司专注现金流 → LIFO更具优势。

Extension (拓展):
Accounting policy consistency is key; frequent changes reduce comparability and credibility.
保持方法一致性是关键,频繁变更会削弱财务报表的可比性与可信度。


Image/Data Analysis(图片/数据分析)

幻灯片中央绿色框显示:
Decide when the use of different inventory costing methods is beneficial to a company.
代表决策导向:强调“选择时机”与“企业利益一致性”。


Summary (总结)

  • 选择存货方法需匹配企业战略目标。
  • 不同经济环境下方法效益不同。
  • 一致性原则保证可比性与信任度。

Slide 7-47 — Managers’ Choice of Inventory Methods

第7-47页——管理层选择存货方法的动机

Knowledge Points(知识点)

  • Net Income Effects(净利润影响)
  • Income Tax Effects(税务影响)

Net Income Effects(净利润影响)

Explanation (解释):
Managers prefer methods that report higher earnings to show strong performance and attract investors.
管理层倾向选择能报告较高利润的方法,以展示公司业绩并吸引投资者。

Example (例子):
当物价上涨时 → FIFO产生较低COGS → 较高毛利与净利润。

Extension (拓展):
Higher reported earnings may boost share prices or help in securing financing, though taxes also increase accordingly.
高利润能提升股价或融资能力,但也带来更高税负。


Income Tax Effects(税务影响)

Explanation (解释):
Managers prefer to minimize tax payments legally by using methods that reduce taxable income (like LIFO).
管理层希望在合法范围内通过采用LIFO等方法来降低应税所得,从而延迟缴税。

Example (例子):
LIFO在通胀期带来较高COGS → 较低应税利润 → 减少当期税额。

Extension (拓展):
Tax deferral improves cash flow, allowing reinvestment and liquidity management.
推迟缴税能改善现金流,为再投资和流动性管理提供资金。


Image/Data Analysis(图片/数据分析)

图中两个矩形框:

  • 左侧“Net Income Effects: Managers prefer higher earnings.”
  • 右侧“Income Tax Effects: Managers prefer to pay least taxes allowed by law.”
    两幅卡通头像象征管理层在“利润最大化”与“税负最小化”之间的权衡。

Summary (总结)

  • 管理层在利润与税务之间平衡选择方法。
  • FIFO有利于报表利润;LIFO有利于节税。
  • 战略选择取决于公司阶段与市场环境。

Slide 7-48 — Choosing Inventory Costing Methods & LIFO Conformity Rule

第7-48页——存货方法选择与LIFO一致性原则

Knowledge Points(知识点)

  • LIFO Conformity Rule(LIFO一致性原则)
  • Tax vs. Book Reporting Requirement(税务与账面报告的对应要求)

LIFO Conformity Rule(LIFO一致性原则)

Explanation (解释):
Under U.S. GAAP, if a company uses LIFO for tax purposes, it must also use LIFO for financial reporting.
根据美国会计准则(GAAP),若企业在税务申报中采用LIFO,则在财务报告中也必须采用LIFO。

Example (例子):
若公司希望以LIFO减少税收 → 必须同时在会计账簿中使用LIFO。

Extension (拓展):
This prevents firms from manipulating income by reporting different inventory values for tax and financial purposes.
该规则防止企业通过税务与财务报告间的不一致来操纵利润。


Tax vs. Book Reporting Requirement(税务与账面报告的对应要求)

Explanation (解释):
The conformity rule ensures consistency between book and tax income measurement.
一致性原则确保账面利润与应税利润在方法上保持一致。

Example (例子):
企业不能:

  • 税务上用LIFO减少税收,
  • 报表上用FIFO提高净利润。

Extension (拓展):
Promotes transparency and comparability among firms using LIFO in both contexts.
这一规则促进了采用LIFO企业之间的透明度与可比性。


Image/Data Analysis(图片/数据分析)

图中左侧为“LIFO for taxes”,右侧为“LIFO for books”,
中间红色箭头指向“LIFO Conformity Rule”,
象征税务与财务报告的一致性要求。


Summary (总结)

  • 若税务申报采用LIFO,财务报告也必须使用LIFO。
  • 一致性原则防止利润操纵。
  • 保证税务与会计报告的透明与对称性。

Slide 7-49 — Inventory Methods and Financial Statement Analysis

第7-49页——存货方法与财务报表分析

Knowledge Points(知识点)

  • LIFO Reserve(LIFO储备的含义)
  • Conversion between LIFO and FIFO(LIFO与FIFO的转换)

LIFO Reserve(LIFO储备的含义)

Explanation (解释):
LIFO Reserve represents the difference between the inventory value reported under FIFO and LIFO methods.
LIFO储备表示在FIFO与LIFO方法下存货账面价值的差额。

Example (例子):
公式:

  • Beginning LIFO Reserve = Beginning FIFO Inventory − Beginning LIFO Inventory
  • Ending LIFO Reserve = Ending FIFO Inventory − Ending LIFO Inventory

Extension (拓展):
Analysts use LIFO Reserve to adjust LIFO-based companies to a FIFO basis for better comparability.
分析师可利用LIFO储备将LIFO公司的数据调整为FIFO口径,以便与其他公司可比。


Conversion between LIFO and FIFO(LIFO与FIFO的转换)

Explanation (解释):
Change in the LIFO Reserve from beginning to end of the period indicates the difference in COGS under FIFO and LIFO.
LIFO储备期初与期末的变化额反映FIFO与LIFO之间COGS的差异。

Example (例子):
Difference in COGS = Beginning LIFO Reserve − Ending LIFO Reserve

Extension (拓展):
When LIFO Reserve increases, FIFO income would be higher (as older, cheaper costs remain in COGS).
当LIFO储备增加时,FIFO下的利润更高,因为旧成本仍保留在销售成本中。


Image/Data Analysis(图片/数据分析)

图中展示:

  • 左侧:Beginning Inventory FIFO − LIFO = Beginning LIFO Reserve
  • 右侧:Ending Inventory FIFO − LIFO = Ending LIFO Reserve
    下方蓝色公式框:
    Beginning LIFO Reserve − Ending LIFO Reserve = Difference in COGS under FIFO

Summary (总结)

  • LIFO储备用于反映FIFO与LIFO存货差异。
  • 储备的变动决定两种方法下COGS的差额。
  • 便于分析师将LIFO公司报表转换为FIFO口径。

Slide 7-50 — Valuation at Lower of Cost or Market (LCM)

第7-50页——成本与市价孰低法

Knowledge Points(知识点)

  • Concept of LCM(成本与市价孰低原则)
  • Replacement Cost and Conservatism(重置成本与稳健原则)

Concept of LCM(成本与市价孰低原则)

Explanation (解释):
Inventories must be valued at the lower of historical cost or market value to prevent overstating assets.
企业应以成本与市价孰低者计量存货,以防资产高估。

Example (例子):
若存货原始成本为200,则按$200计入报表。

Extension (拓展):
This rule reflects the conservatism principle, recognizing losses when probable but not unrealized gains.
此法体现了稳健性原则,即“预期损失应确认,预期收益不应确认”。


Replacement Cost and Conservatism(重置成本与稳健原则)

Explanation (解释):
Replacement cost refers to the current purchase price for identical inventory items.
重置成本是指相同商品的当前采购价格。

Example (例子):
若电脑芯片成本200,则公司应在当期确认$50损失。

Extension (拓展):
The holding loss is recognized immediately in the period of price decline, not deferred to the sale period.
价格下跌引发的存货损失应在当期确认,而非等到销售时再反映。


Image/Data Analysis(图片/数据分析)

图中三层结构:

  • 红色框:Ending inventory is reported at the lower of cost or market (LCM)
  • 绿色框:Replacement cost = current purchase price
  • 蓝色框:说明稳健原则下的当期“holding loss”确认。

Summary (总结)

  • LCM防止高估资产,符合稳健原则。
  • 市场价低于成本时立即确认损失。
  • “重置成本”体现存货现时价值。

Slide 7-51 — Journal Entry for LCM Adjustment

第7-51页——LCM调整的会计分录

Knowledge Points(知识点)

  • Recognizing Inventory Loss under LCM(确认存货跌价损失)
  • Journal Entry for Write-down(计提跌价的分录)

Recognizing Inventory Loss under LCM(确认存货跌价损失)

Explanation (解释):
When market value falls below cost, inventory must be written down to market value.
当市场价格低于成本时,应将存货减记至市价。

Example (例子):

ItemQuantityCostReplacement CostLCMTotal LCM
Pentium Chips1,000$250$200$200$200,000
Disk Drives400$100$110$100$40,000

Extension (拓展):
The total write-down = (Cost − LCM) × Quantity = (250 − 200) × 1,000 = $50,000.


Journal Entry for Write-down(计提跌价的分录)

Explanation (解释):
The loss is recorded as an expense in the current period.
跌价损失应在当期确认为费用。

Example (例子):

DateDescriptionDebitCredit
Cost of Goods Sold50,000
Inventory50,000

Extension (拓展):
Some firms may instead use an “Inventory Loss” account for clearer reporting.
部分企业可能采用“存货跌价损失”账户以提高披露透明度。


Image/Data Analysis(图片/数据分析)

图表展示:

  • 上半部分列出各商品成本与LCM比较。
  • 下半部分显示分录:
    Dr. COGS 50,000
  • 黄色说明文字强调:损失在当期确认。

Summary (总结)

  • 当市价低于成本时应计提跌价准备。
  • 分录:借记COGS,贷记Inventory。
  • 跌价损失体现稳健性原则的应用。

Slide 7-52 — Inventory Turnover Ratio

第7-52页——存货周转率

Knowledge Points(知识点)

  • Formula and Definition(公式与定义)
  • Interpretation and Business Meaning(指标含义与经营意义)

Formula and Definition(公式与定义)

Explanation (解释):
The inventory turnover ratio measures how efficiently a company converts inventory into sales.
存货周转率衡量企业将库存转化为销售的效率。

Example (例子):
公式:
Inventory Turnover = COGS ÷ Average Inventory
Average Inventory = (Beginning Inventory + Ending Inventory) ÷ 2

Extension (拓展):
A high ratio suggests strong sales or efficient inventory management; a low ratio may imply overstocking or weak demand.
周转率高说明销售良好或库存管理高效;周转率低可能表明积压或需求疲软。


Interpretation and Business Meaning(指标含义与经营意义)

Explanation (解释):
The ratio indicates how many times inventory is sold and replaced during a period.
该比率表示存货在一定期间内被销售和补充的次数。

Example (例子):
若COGS = 100,000,
则周转率 = 500,000 ÷ 100,000 = 5 次/年。

Extension (拓展):
Companies in fast-moving industries (e.g., retail) typically have higher ratios than those in heavy manufacturing.
快速消费行业的周转率通常高于重工业企业。


Image/Data Analysis(图片/数据分析)

图中绿色框公式:
Inventory Turnover = COGS ÷ Average Inventory
下方文字框说明:周转率越高,存货流动越快,存储与过期成本越低。


Summary (总结)

  • 周转率反映库存销售速度与管理效率。
  • 高比率 = 高效率;低比率 = 积压风险。
  • 适合结合行业平均值分析。

Slide 7-53 — Internal Control of Inventory

第7-53页——存货的内部控制

Knowledge Points(知识点)

  • Internal Control Objectives(内部控制目标)
  • Key Control Procedures(主要控制措施)

Internal Control Objectives(内部控制目标)

Explanation (解释):
Inventory controls safeguard assets, ensure accuracy of records, and promote operational efficiency.
存货内部控制的目标是保护资产、确保账实相符、提升运营效率。

Example (例子):
防止存货被盗、损坏或误报;同时确保数量与账面记录一致。

Extension (拓展):
Strong control reduces fraud risk and improves reliability of financial reporting.
健全的控制制度能降低舞弊风险,提高财务报告的可靠性。


Key Control Procedures(主要控制措施)

Explanation (解释):
Key practices include segregation of duties, access restriction, and reconciliation of records.
主要措施包括职责分离、访问权限限制与定期核对记录。

Example (例子):
1 将实物管理与会计记录职责分离。
2 限制存货仓库访问权限。
3 维护永续盘存系统。
4 定期比对账面记录与实物盘点结果。

Extension (拓展):
Effective inventory control systems integrate technology (e.g., RFID, barcodes) to track and verify assets.
现代化控制系统利用RFID或条形码技术实现实时监控与追踪。


Image/Data Analysis(图片/数据分析)

幻灯片展示五项控制措施:

  • Separation of duties(职责分离)
  • Storage protection(防盗防损)
  • Access limitation(限制访问)
  • Maintaining perpetual records(维护永续记录)
  • Periodic reconciliation(定期盘点比对)

Summary (总结)

  • 存货内部控制保障资产安全与数据准确。
  • 职责分离与定期盘点是核心措施。
  • 科技手段提升控制效率与透明度。