Line following information appies 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 330 units 80 units 210 units 60 units $10 = $3,300 $11 = 880 $13 = 2,730 $14 = 840 During the year, The Shirt Shop sold 520 T-shirts for $19 each. b. Compute the gross margin using the FIFO cost flow assumption FIFO Gross margin