Required information The following information applies to the questions displayed below. The Shirt Shop had the following transactions for T-shirts for 2018, its first year of operations: Jan. 20 Purchased Apr. 21 Purchased July 25 Purchased Sept. 19 Purchased 390 units 3-$1,170 110 units4440 230 units6-1,380 8720 90 units During the year, The Shirt Shop sold 620 T-shirts for $13 each. b. Compute the gross margin using the FIFO cost flow assumption. Answer is complete but not entirely correct. FIFO Gross S 6,680 8