Suppose that Amazon uses a periodic inventory system and reports the following for the month of June Unit Date Explanation Units Cost Total Cost June 1 Inventory 225 $7 $1.575 12 Purchase 525 8 4,200 23 Purchase 750 9 6,750 30 Inventory 280 (a) Compute the cost of the ending inventory and the cost of goods sold under (1) FIFO, (2) LIFO, and (3) average-cost. (Round average cost per unit to 2 decimal places, eg. 5.25 and final answers to 0 decimal places, e.g. 2,520.) FIFO Ending inventory $ Cost of goods sold: $ eTextbook and Media LIFO AVERAGE-COST $ $