Course Video
A rendered sample lesson that teaches inventory method effects through cost-layer routing.
Lesson Script
0:00-0:12
Hook
Visual
Four inventory cost layers appear: 10, 12, 15, and 18. The layers hover between inventory and COGS.
Voiceover
The trap with FIFO and LIFO is that the exam is not really asking about inventory. It is asking where each cost layer goes.
0:12-0:24
Same Company
Visual
Same sales, same units sold, and same physical inventory stay locked while accounting method changes.
Voiceover
Same company. Same units sold. Same revenue. But when prices are rising, FIFO and LIFO route different costs to the income statement.
0:24-0:40
FIFO Route
Visual
Older, cheaper layers move into COGS. Newer, higher-cost layers remain in ending inventory.
Voiceover
FIFO means first in, first out. The older costs leave first, so COGS is lower and gross profit is higher.
0:40-0:56
LIFO Contrast
Visual
The newest, higher-cost layers move into COGS. Ending inventory keeps the older costs.
Voiceover
LIFO does the opposite. Newer costs hit COGS first, so gross profit falls and ending inventory is lower.
0:56-1:10
Exam Answer
Visual
A CFA-style answer choice resolves into the chain: old costs to COGS, lower COGS, higher profit, higher ending inventory.
Voiceover
Do not memorize the table. Follow the route. Once you see where the cost layer goes, the answer usually falls out.
Lesson Objective
Make the directionality and second-order effects of inventory accounting automatic.
Visual Teaching Plan
Rising-cost inventory blocks flow through FIFO and LIFO side by side, then update statements and ratios.
High-Yield Map
- Under rising prices, FIFO usually reports lower COGS and higher ending inventory.
- LIFO usually reports lower taxable income and better operating cash flow where tax effects apply.
- Inventory method changes affect profitability, liquidity, and turnover ratios.
Common Traps
- Memorizing gross profit but forgetting cash tax effects.
- Answering ratio questions from the wrong numerator or denominator.
- Forgetting the direction reverses under falling prices.
Repair Drills
- Run the same sale through FIFO and LIFO using three cost layers.
- List the effect on gross margin, current ratio, inventory turnover, and cash taxes.