📦 Inventory Valuation Costing Methods — Enrolled Agent Exam | EA Part 2 Businesses

Farhat Lectures (CPA & Accounting)
Farhat Lectures (CPA & Accounting)Apr 18, 2026

Why It Matters

Inventory valuation determines COGS, taxable profit, and compliance; errors can trigger tax adjustments or penalties.

Key Takeaways

  • Cost method records inventory at actual acquisition costs and related expenses.
  • Lower‑of‑Cost‑or‑Market forces write‑downs when market value falls significantly.
  • Retail method estimates ending inventory using sales and markup percentages.
  • Inventory level inversely affects cost of goods sold and taxable profit.
  • Shrinkage losses are charged to COGS, increasing expenses and reducing profit.

Summary

The video by Professor Farhhat explains inventory valuation costing methods essential for the Enrolled Agent exam, focusing on tax‑reporting implications of the cost, lower‑of‑cost‑or‑market, retail, and shrinkage approaches.

He outlines the cost method—recording purchase price, freight, handling, and production overhead as product costs—and shows how beginning and ending inventory drive COGS (beginning + purchases − ending). The lower‑of‑cost‑or‑market rule requires writing down items whose market or replacement value falls below cost, illustrated with calculators dropping from $10 to $8. The retail method estimates ending inventory by applying a consistent markup to sales, useful for large retailers.

Example: an artisan furniture business with $4,000 beginning inventory, $25,000 sales, and $6,500 ending inventory yields COGS $15,000, demonstrating the inverse relationship between ending inventory and profit. He also highlights that manipulating inventory levels shifts COGS across periods, and that shrinkage (theft, damage) must be booked against COGS, raising expenses.

For practitioners, accurate inventory costing directly impacts taxable income, compliance with IRS rules, and financial‑statement reliability. Mastery of these methods helps agents advise clients on tax planning, avoid penalties, and optimize profit reporting.

Original Description

In this video lecture, we break down the IRS rules for inventory valuation costing methods, including FIFO, LIFO, and the Specific Identification method. Understanding how these cost flow assumptions impact Cost of Goods Sold (COGS) and net taxable income is crucial for tax professionals to accurately prepare business returns and advise clients strategically. This comprehensive review delivers the targeted compliance knowledge you need to confidently master these accounting concepts and maximize your score on the Enrolled Agent Exam.
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