Lesson 8: Inventory Valuation Comparison Project: FIFO vs LIFO Strategic Analysis

• How do FIFO and LIFO affect Cost of Goods Sold and Ending Inventory?
• How does inflation influence financial results under each method?
• How does inventory valuation affect tax liability and profitability?
• Which method presents a stronger financial position?
• Is there a “best” method, or does it depend on the company’s goals?

FIFO
LIFO
Cost Flow Assumption
Cost of Goods Sold
Ending Inventory
Gross Profit
Net Income
Inflation
Tax Liability
Working Capital
GAAP
IFRS

HS.CTE.2A – Recall and apply prior knowledge for intended purpose.
HS.CTE.2B – Pose questions and make predictions about problems.
HS.CTE.2C – Apply a solution using evidence and reasoning.

Students interpret financial data, analyze numerical trends, evaluate cause-and-effect relationships, and support conclusions with evidence. These analytical reasoning skills align with SAT problem solving and data interpretation standards.

Description: Students are given a rising-cost inventory data set. Using both FIFO and LIFO, students will:

• Calculate COGS
• Calculate Ending Inventory
• Determine Gross Profit
• Compare Net Income impact

Purpose: To move students from procedural accounting into analytical decision-making. Students must evaluate financial outcomes, defend reasoning with evidence, and recognize that accounting choices influence business strategy.


DOK Level Questions

DOK 1
• Identify differences between FIFO and LIFO.

DOK 2
• Calculate financial results under both methods.

DOK 3
• Explain how inflation impacts each method differently.

DOK 4
• Defend which method a company should adopt, using financial evidence and strategic reasoning.

Students examine how U.S. companies may use LIFO during inflation to reduce taxes, while international companies must use FIFO due to IFRS rules.

• Completed calculations
• Financial comparison chart
• Written recommendation (1–2 pages or presentation)
• Rubric-based evaluation

• Ratio formula guides with step-by-step modeling
• Real-life pricing examples students recognize
• Color-coded financial statement mapping
• Guided practice before independent analysis
• Small-group financial interpretation discussion
• Excel modeling for ratio calculations
• Spanish vocabulary support for ELL students
• One-on-one reteaching as needed

• Ratio calculation worksheet
• Short financial analysis paragraph
• Exit Ticket:
“How does inflation affect inventory reporting and profitability?”
• Quiz on reporting and ratios
• Online interactive review game

Century 21 Accounting General Journal, 11th Edition (print or MindTap)
Financial statement examples
Ratio worksheet
Calculator
Excel (optional for modeling)
Exit Ticket