C Textbooks eBook Show Me How 1. Determine the cost of the inventory on December 31 by the first-in, first-out method. If the inventory of a particular model comprises one entire purchase plus a portion of another purchase acquired at a different unit cost, use a separate line for each purchase. If units are in inventory at two different costs, enter the units PURCHASED MOST RECENTLY first. Pappa's Appliances Cost of the Inventory-FIFO Method Model Quantity C55 C55 D11 D11 < F32 F32 H29 K47 K47 S33 X74 Total Check My Work December 31 Unit Cost Total Cost Previous