Perpetual inventory using FIFO Beginning inventory, purchases, and sales data for DVD players are as follows: The business maintains a perpetual inventory system, costing by the first-in, first-out method. a. Determine the cost of goods sold for each sale and the inventory balance after each sale, presenting the data in the fo different costs, enter the units with the LOWER unit cost first in the Cost of Goods Sold Unit Cost column and in the Inver b. Based upon the preceding data, would you expect the inventory to be higher or lower using the last-in, first-out m