The Shirt Shop had the following transactions for T-shirts for Year 1, its first year of operations: January 20 April 21 Purchased Purchased 400 units 200 units .. @ $8 $3,200 $10 2,000 July 25 Purchased 280 units $13 3,640 September 19 Purchased 90 units $15 1,350 During the year, The Shirt Shop sold 810 T-shirts for $20 each. Required 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.