The Shirt Shop had the following transactions for T-shirts for Year 1, its first year of operations: Jan. 20 Purchased Apr. 21 Purchased July 25 Purchased Sept. 19 Purchased 330 units 140 units 250 units 90 units @ @ @ @ $12 = $13 $14 $16 $3,960 1,820 3,500 1,440 During the year, The Shirt Shop sold 630 T-shirts for $21 each. Required ES a. Compute the amount of ending inventory The Shirt Shop would report on the balance sheet, assuming the following cost flow assumptions: (1) FIFO, (2) LIFO, and (3) weighted average. b. Compute the difference in gross margin between the FIFO and LIFO cost flow assumptions