Think of the last time you went shopping for a big family dinner. You threw in a turkey, some cranberry sauce, a bag of potatoes, and that one overpriced cheese you didn’t plan to buy. When you got to the register, the total made you gasp like you’d just seen a ghost.
That total is the cost of goods purchased, but with a twist: it only counts the stuff you’re going to sell or use up. It’s not the same as the total on your receipt, because you’re not eating the plastic bags or the receipt paper—unless you’re really hungry.
Strip away the fluff
To compute it, you start with the invoice price—the amount the vendor charged you for the products. This is like the sticker price on a used car, before you haggle or cry. Then you add in every dumb expense you swallowed just to get the goods into your warehouse or pantry.
Think of it as the cost of getting the party started: freight charges, shipping fees, insurance, and customs duties. If you paid a truck driver to haul your bulk toilet paper from Ohio, that cost is part of the calculation. Yes, even if he listened to loud country music the entire way.
