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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 form illustrated in Exhibit 3 . Under FIFO, if units are in inventery at two different costs, enter the units with the LoweR unit cost frst in the Cost of Goods 50 ld Unit Cost column and in the inventory Unit Cost column. b. Based upon the preceding data, would you expect the inventory to be higher or lower using the last-in, first-out method