Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales data for portable DVD players are as follows: Apr. 1 42 units $78 Inventory Sale 10 28 units 15 Purchase 18 units @ $81 20 Sale 18 units 24 Sale Purchase 30 7 units 26 units $86 The business maintains a perpetual Inventory system, costing by the first-In, first-out method. Determine the cost of the merchandise sold for each sale and the Inventory balance after each sale, presenting the data in the form llustrated in Exchibit 3. a. Under FIFO, If units are in invertory at two different costs, enter the units with the LOWER unit cost first in the Cost of Marchandise Sold Unit Cost column and in the Inventory Unit Cost column Cost of the Merchandice Sold Schacu