Inventory Costing and Valuation Methods5 min
Inventory accounting begins with determining which costs are capitalized. Only costs directly attributable to bringing inventory to its current condition and location (purchase, conversion, freight-in) are capitalized. Period costs like abnormal waste, storage (unless part of production), and selling expenses are expensed as incurred.

The choice of valuation method—FIFO, LIFO, or Weighted Average—significantly affects financial statements. FIFO (First-In, First-Out) matches physical flow for perishable goods, resulting in inventory values that approximate current replacement cost. LIFO (Last-In, First-Out), allowed only under US GAAP, matches current costs with current revenues, providing a better measure of earnings quality in inflationary environments but leaving the balance sheet with outdated costs. The Weighted Average method smooths out price fluctuations.

Key Points

  • Capitalized costs: Purchase, conversion, freight-in.
  • Expensed costs: Abnormal waste, storage (finished goods), selling, admin.
  • FIFO: Inventory = Recent costs; COGS = Oldest costs.
  • LIFO: Inventory = Oldest costs; COGS = Recent costs (US GAAP only).
  • Weighted Average: Blends costs; results fall between LIFO and FIFO.
Impact of Inflation and LIFO Mechanics6 min
In an inflationary environment, LIFO results in higher COGS and lower Net Income compared to FIFO. This lower income reduces tax liability, thereby increasing operating cash flow. Conversely, FIFO reports higher Net Income (and higher taxes) but a more accurate balance sheet inventory value.

The LIFO Reserve is the cumulative difference between FIFO and LIFO inventory values. Analysts use it to compare companies using different methods: Adjusted Inventory (FIFO basis) = Reported LIFO Inventory + LIFO Reserve. Changes in the LIFO reserve reflect the difference in COGS between the two methods for the period. LIFO Liquidation occurs when inventory quantities decline, causing older, lower costs to flow through the income statement, temporarily boosting margins.

Key Points

  • Inflationary environment: LIFO = Higher COGS, Lower NI, Lower Taxes, Higher Cash Flow.
  • LIFO Reserve: Added to LIFO inventory to approximate FIFO inventory.
  • LIFO Liquidation: Artificially inflates profits by accessing old cost layers.
  • Comparability: Analysts adjust LIFO firms to FIFO assumptions for peer analysis.
Inventory Measurement and Analysis5 min
Inventory must be tested for impairment. Under IFRS, inventory is measured at the Lower of Cost or Net Realizable Value (NRV). NRV is the selling price less selling costs. Write-downs are reversible under IFRS. Under US GAAP, inventory is measured at the Lower of Cost or Market, where Market is usually current replacement cost, subject to a ceiling (NRV) and a floor (NRV - Profit Margin). US GAAP prohibits the reversal of write-downs.

Ratio analysis helps assess efficiency. The Inventory Turnover Ratio measures how often inventory is sold and replaced. A diverging trend between sales growth and inventory growth acts as a warning sign: rising finished goods with falling sales suggests obsolescence risk, while rising raw materials usually signals expected demand growth.

Key Points

  • IFRS: Lower of Cost or NRV; reversals allowed.
  • US GAAP: Lower of Cost or Market (Replacement Cost); reversals prohibited.
  • Market Constraints (GAAP): Ceiling = NRV; Floor = NRV - Normal Profit Margin.
  • Inventory Turnover: COGS / Average Inventory.
  • Analysis: Watch for inventory growth outpacing sales growth.

Questions

Question 1

Which of the following costs should be capitalized as part of inventory?

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Question 2

Under IFRS, inventory is measured at the lower of cost or:

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Question 3

Which inventory valuation method results in the same Cost of Goods Sold (COGS) under both periodic and perpetual inventory systems?

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Question 4

In a period of rising prices and stable inventory quantities, which valuation method results in the highest Net Income?

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Question 5

A company reports an inventory write-down of $5 million. Which of the following ratios will most likely increase immediately following this adjustment?

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Question 6

Which of the following is permitted under US GAAP but not under IFRS?

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Question 7

A manufacturing firm reports the following: Raw Materials Inventory is decreasing, while Work-in-Process (WIP) is decreasing. What does this most likely indicate?

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Question 8

Company A uses LIFO. Its reported LIFO Inventory is $100 million, and its LIFO Reserve is $20 million. What would be the estimated inventory value if the company used FIFO?

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Question 9

LIFO liquidation occurs when a firm:

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Question 10

In a deflationary environment (falling prices), which inventory method results in higher Cost of Goods Sold (COGS)?

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Question 11

A company has a LIFO reserve of $300 at the start of the year and $900 at the end of the year. If LIFO COGS is $1,500, what is the FIFO COGS?

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Question 12

Under US GAAP, the 'market' value for inventory valuation is primarily defined as:

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Question 13

If a company using LIFO liquidates older inventory layers, the immediate effect on the financial statements is:

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Question 14

A firm has an Inventory Turnover Ratio of 4.0. What is the approximate Days of Inventory on Hand (DOH)?

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Question 15

Which of the following best describes the 'ceiling' for market value under US GAAP inventory measurement?

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Question 16

Assuming an inflationary environment, which method results in the highest Operating Cash Flow?

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Question 17

When analyzing a company that uses LIFO, an analyst adjusts the Balance Sheet Inventory to FIFO. To balance the accounting equation, the analyst should also:

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Question 18

If a company's Finished Goods inventory is increasing while its Sales are flat, this most likely signals:

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Question 19

Under IFRS, if the net realizable value (NRV) of previously written-down inventory increases, the company must:

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Question 20

Purchases: Jan (10 @ $10), Feb (10 @ $20). Sales: 10 units in March. What is the COGS using the Perpetual LIFO method?

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Question 21

Which industry type would most likely use the 'Specific Identification' method for inventory valuation?

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Question 22

Under US GAAP, the reversal of a previous inventory write-down is:

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Question 23

Which ratio serves as an indicator of a firm's liquidity by excluding inventory?

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Question 24

For a company with a 'manageably small number of products,' which revenue modeling approach provides the most granular level of detail?

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Question 25

In a periodic inventory system, Cost of Goods Sold (COGS) is determined by:

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Question 26

An extremely high Inventory Turnover Ratio relative to industry peers might indicate:

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Question 27

Cost: $100. Selling Price: $90. Selling Costs: $10. Replacement Cost: $95. Normal Profit: $20. Under IFRS, what is the reported value of the inventory?

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Question 28

Using the same data (Cost $100, NRV $80, Replacement Cost $95, Normal Profit $20), what is the reported value under US GAAP?

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Question 29

Which costing method generally reflects the physical flow of goods for a supermarket selling perishable food?

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Question 30

Which of the following is treated as an expense in the period incurred rather than an inventory cost?

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Question 31

The inventory turnover ratio is calculated as:

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Question 32

Which of the following scenarios allows inventory to be reported above historical cost?

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Question 33

If a company changes from LIFO to FIFO, this change generally requires:

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Question 34

In a period of rising prices, the LIFO reserve generally:

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Question 35

The 'retail method' of inventory valuation involves:

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Question 36

Which accounting standard allows for the reversal of inventory write-downs?

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Question 37

Compared to FIFO, a firm using LIFO in an inflationary environment will report:

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Question 38

A LIFO liquidation results in sustainable higher profits for the company.

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Question 39

Which inventory system requires a physical count to calculate Cost of Goods Sold?

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Question 40

If a company has a LIFO Reserve of $50,000 and a tax rate of 30%, what is the cumulative tax saving realized by using LIFO instead of FIFO?

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Question 41

During deflation, using LIFO rather than FIFO will result in:

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Question 42

When comparing two firms, one using LIFO and one using FIFO, the analyst should generally:

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Question 43

Standard costing involves:

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Question 44

Which component is NOT included in the calculation of Net Realizable Value (NRV)?

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Question 45

Purchases: Jan (10 units), Feb (10 units). Sales: 10 units in March. Under the Weighted Average Cost method, the cost per unit is determined by:

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Question 46

An analyst observes that a company’s LIFO reserve has decreased significantly from the prior year. This could indicate:

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Question 47

Inventory disclosures in the financial statement footnotes typically include:

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Question 48

Under the US GAAP 'Lower of Cost or Market' rule, if Replacement Cost is $50, NRV is $70, and NRV minus Profit Margin is $55, what is the 'Market' value?

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Question 49

Which of the following creates a 'permanent difference' between tax and accounting books related to inventory?

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Question 50

If a firm uses LIFO and prices are stable (no inflation or deflation), LIFO COGS will be:

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