Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales data for DVD players are as follows: November 1 Inventory 63 units at $98 10 Sale 43 units 15 Purchase 27 units at $104 20 Sale 29 units 24 Sale 8 units 30 Purchase 31 units at $110 The business maintains a perpetual inventory system, costing by the first-in, first-out method. two different costs, enter the units with the LOWER unit cost first in the Cost of Goods Sold Unit Cost column and in the Inventory Unit Cost column. Cost of the Goods Sold Schedule First-in, First-out Method DVD Players Date Quantity Purchased Purchases Unit Cost Purchases Total Cost Quantity Sold Cost Goods Unit C of Sold ost Cost of Goods