Suppose that Amazon uses a periodicinventory system and reports the following for the month of June: (a) Compite the cost of the ending imventory and the cost of goods sold under (1) FIFO, (2) LIFO, and (3) average cost. (Round overege cost per unit to 2 decimal places, es 5.25 and final anwers to 0 decimal ploces, es. 2.520)