Hey, welcome to VoraPrep Audio. Glad you could tune in. Today we're talking about inventory valuation. I want you to imagine two companies. They're identical in every way. Same product, same sales, same everything. But at the end of the year, Company A reports ten million in profit, and Company B reports just seven million. How is that possible? It comes down to a single accounting choice: how they value their inventory. This isn't just a boring compliance task. It’s a strategic decision. It directly impacts your reported profit, your tax bill, and the story your financials tell. The whole idea here is based on a cost flow assumption. And the key word is assumption. It doesn’t have to match how the goods are physically moving off the shelves. Think about a grocery store. When you're managing the dairy aisle, you're always pushing the older milk to the front. It sells first before it expires. That's FY-foh. First-In, First-Out. Now picture the nail bin at a hardware store. Customers just grab a handful from the top of the pile. Those are the newest nails that were just dumped in. The old nails from years ago are sitting at the very bottom. That's LIFE-oh. Last-In, First-Out. So when you see one of these problems on the exam, take a breath. Here’s how to walk through it without getting tangled up. First, identify what method the question is asking for—FY-foh, LIFE-oh, or Weighted-Average. Then, I find it helpful to map out the inventory layers. Just jot down the date, the units, and the cost per unit for each purchase. It keeps everything straight. From there, you can calculate your Cost of Goods Sold, then your ending inventory. And always do a quick check at the end. Your C.O.G.S. plus your ending inventory should equal your total goods available for sale. It’s a simple check that can save you. Let's walk through an example. We'll use a company called Astro Widgets Inc. They use a periodic system, which makes the math a bit cleaner. Here’s their data for April.
On April 1st, they had a beginning inventory of 100 widgets at $10 a piece. That's $1,000.
On April 10th, they bought 200 more at $12 each.
And on April 25th, they bought another 150. Prices went up again, so these were $14 each. All together, they had 450 units available to sell, with a total cost of $5,500. During April, they sold 320 units. That means they have 130 units left in ending inventory. Okay, let's run the numbers three ways. First up, FY-foh. First-In, First-Out. We need to account for the cost of the 320 units they sold. With FY-foh, we assume we sell the oldest stuff first. So we start at the top of our list. We sell all 100 of those beginning units at $10. That's $1,000 of our C.O.G.S. Then we sell all 200 of the units from the April 10th purchase at $12. That's another $2,400. So far, we've accounted for 300 units sold. We need to get to 320, so we need 20 more. We take those from the next layer, the April 25th purchase, at $14 each. So, 20 times $14 is $280. Add it all up. $1,000 plus $2,400 plus $280 gives us a total Cost of Goods Sold of $3,680. What’s left in ending inventory? We had 150 units in that last purchase, and we only sold 20 of them. So we have 130 units left, all at that $14 cost. That's an ending inventory of $1,820.
Quick check$3,680 in C.O.G.S. plus $1,820 in ending inventory equals $5,500. Perfect. It matches our total goods available. Now, let's do the same problem with LIFE-oh. Last-In, First-Out. We sold the same 320 units, but now we assume we sold the newest ones first. We start from the bottom of our purchase list. We sell all 150 units from the April 25th purchase at $14. That's $2,100. We still need to account for 170 more units to get to 320. So, we move to the next newest layer—the April 10th purchase. We sell 170 of those units at $12 each. That's $2,040. Our total C.O.G.S. under LIFE-oh is $2,100 plus $2,040, which is $4,140. Notice how it's higher than FY-foh. That's because prices were rising. So what's left for ending inventory? The oldest stuff. We have the 100 units from beginning inventory at $10. And we have 30 units left from that April 10th purchase at $12. That gives us a total ending inventory of $1,360. And again, if you add the C.O.G.S. and ending inventory, it adds up to $5,500. If you got a different answer, you might have accidentally started from the top again. It's a really easy mistake to make under pressure. Just remember the name: LIFE-oh sells the Last-In units First-Out. Finally, there's the weighted-average method. This one smooths everything out. You don't worry about layers. You just calculate one average cost for everything. The total cost of goods available was $5,500, and we had 450 total units. Divide $5,500 by 450, and you get an average cost of about $12.22 per unit. To get C.O.G.S., you just multiply the units sold—320—by that average cost. That gives you a C.O.G.S. of about $3,911. For ending inventory, you take the remaining 130 units and multiply by that same average cost. That gives you about $1,589. And once again, they add up to $5,500. In an environment with rising prices, like our example, there's a great memory aid. LIFE-oh equals Lower Income, Lower Inventory, and Lower Taxes. It makes sense. With LIFE-oh, you're expensing your newest, most expensive inventory first. This means your C.O.G.S. is higher. That leads to lower reported income, and therefore, a lower tax bill. FY-foh is the exact opposite. And weighted-average will always land you somewhere in the middle. Now, there's a trap with LIFE-oh you need to watch for on the exam. It's called LIFE-oh liquidation. This happens when a company sells more inventory than it buys in a period. This forces them to dip into those really old, cheap inventory layers from the past. The result? Your Cost of Goods Sold looks artificially low. This makes your net income shoot up, and your tax liability shoots up with it. It completely negates the tax benefit of using LIFE-oh. So, be on the lookout for certain scenarios. For example, a LIFE-oh company has a huge sale. Or maybe a supply chain problem stops them from buying new inventory. That's a classic setup for LIFE-oh liquidation. Before we wrap up, there's one more critical piece. After you do all this costing, you have to apply a valuation rule. G.A.A.P. says you can't overstate your assets. So, inventory has to be reported at the lower of its cost or its net realizable value—N.R.V. The N.R.V. is just the estimated selling price minus any costs to complete and sell it. Let's go back to our FY-foh example. The ending inventory cost was one thousand eight hundred twenty dollars. Now, imagine the market for these widgets suddenly weakens. Let's say their estimated selling price, minus the costs to sell them, is now only one thousand seven hundred dollars. That's the N.R.V. In this case, the N.R.V. of seventeen hundred is lower than the cost of eighteen twenty. So, you would have to write down the inventory value by one hundred twenty dollars. And here’s the final pitfall. That simple Lower of Cost or N.R.V. rule applies to FY-foh and weighted-average. But for LIFE-oh, it's different. LIFE-oh uses a more complicated rule called Lower of Cost or Market. Here, "Market" means the replacement cost. But that replacement cost has a ceiling and a floor. The ceiling is the N.R.V. The floor is the N.R.V. minus a normal profit margin. The value you actually use for "Market" is the middle of those three numbers: replacement cost, ceiling, and floor. The exam loves to test this distinction, hoping you'll just apply the simple N.R.V. rule to a LIFE-oh problem. Don't fall for it. So on exam day, when you see an inventory question, first check if prices are rising or falling. This tells you immediately what the relationship between FY-foh and LIFE-oh results should look like. That can help you eliminate wrong answers. Also, don't forget that LIFE-oh is prohibited under I.F.R.S. That's a key global distinction.
To recapFY-foh sells the old stuff first, giving you a higher net income when prices rise. LIFE-oh sells the new stuff first, giving you a better match of current costs to revenue and some tax benefits. And weighted-average smooths it all out. VoraPrep is a full exam-prep app — lessons, practice questions, and an A.I. tutor in one place. Get started at Vora Prep dot com.