Correct Option: B. Last-In, First-Out (LIFO) Detailed Explanation:

1. Understanding Inventory Valuation Methods:
2. First-In, First-Out (FIFO): This method assumes that the oldest inventory items are sold first. In periods of rising prices, FIFO results in lower cost of goods sold (COGS) because the older, cheaper costs are matched against current revenues. This leads to a higher ending inventory value.
3. Last-In, First-Out (LIFO): This method assumes that the most recently purchased items are sold first. In periods of rising prices, LIFO results in higher COGS because the newer, more expensive inventory costs are matched against revenues. Consequently, this leads to a lower ending inventory value.
4. Weighted Average Cost: This method averages the cost of all inventory items available for sale during the period. In rising price environments, this method will yield a value that is between FIFO and LIFO, but it does not typically result in the lowest inventory value.
5. Specific Identification: This method tracks the actual cost of each specific item of inventory. It is often used for unique or high-value items. The impact on inventory valuation depends on the specific costs of the items sold and remaining, but it does not inherently lead to the lowest inventory value in a general sense.
6. Why LIFO Results in the Lowest Inventory Value:
7. In a period of rising prices, the most recently purchased inventory (which is more expensive) is sold first under LIFO. This means that the COGS reflects these higher costs, reducing taxable income and resulting in a lower net income.
8. Since the older, cheaper inventory remains on the balance sheet, the ending inventory value is lower compared to FIFO, where the older costs are matched against revenues.
9. Why Other Options Are Incorrect:
10. A. FIFO: As explained, FIFO results in a higher ending inventory value during periods of rising prices because it uses the older, cheaper costs for COGS.
11. C. Weighted Average Cost: This method averages costs, which means it will yield a value that is higher than LIFO but lower than FIFO in a rising price environment. It does not specifically target the lowest inventory value.
12. D. Specific Identification: This method does not inherently lead to the lowest inventory value as it depends on the actual costs of the specific items sold. It can vary widely based on the nature of the inventory.

Example Calculation: Assume a company has the following inventory purchases: - 100 units at $10 each (oldest) - 100 units at $15 each (newest) Using FIFO: - If 150 units are sold, COGS = (100 units x $10) + (50 units x $15) = $1000 + $750 = $1750 - Ending Inventory = 50 units x $15 = $750 Using LIFO: - If 150 units are sold, COGS = (100 units x $15) + (50 units x $10) = $1500 + $500 = $2000 - Ending Inventory = 50 units x $10 = $500 Using Weighted Average Cost: - Average Cost = [(100 x $10) + (100 x $15)] / 200 = $12.50 - COGS = 150 units x $12.50 = $1875 - Ending Inventory = 50 units x $12.50 = $625 In this example, LIFO results in the lowest ending inventory value of $500. Common Pitfalls:

• Students often confuse the effects of FIFO and LIFO on net income and inventory valuation. Remember that LIFO leads to higher COGS and lower ending inventory in inflationary periods.
• Misunderstanding the application of the weighted average method can lead to incorrect calculations of inventory value.

Revision Summary:

• LIFO results in the lowest reported inventory value during rising prices due to higher COGS.
• FIFO results in higher inventory values as it uses older, cheaper costs.
• Weighted Average Cost provides a middle ground and does not specifically target the lowest value.
• Specific Identification varies based on actual costs and does not inherently lead to the lowest inventory value.