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Perpetual Inventory Using FiFO Beginning itwentory, purchases, and sales data for portable game players are as follows: The business maintains a perpetual inventory system, costing by the first-in, first-out method. a. Determine the cost of the merchandise sold for each sale and the inventory balance after each sale, presenting the data in the form iliustrated in Exhibit 3. Under FIFO, if units are in inventory at two different costs, enter the units wath the LOWER unit cost first in the Cost of Merchandise Sold Unit Cost column and in the Inventory Unit Cost column