Tree Seedlings has the following current-year purchases and sales for its only product. Date January 1 Activities Beginning inventory Units Acquired at Cost Units Sold at Retail 160 units January 3 February 14 February 15 June 30 Sales Purchase Sales Purchase 246 units @ $2 $ 320 @ $3 = $ 738 110 units 180 units @ $ 8 @ $ 8 210 units @ $4 = $840 November 6 November 19 Sales Purchase 158 units @ $ 8 Totals 68 units 684 units @ $5 = $340 $ 2,238 448 units Required: The company uses a perpetual inventory system. a. Determine the costs assigned to ending inventory and to cost of goods sold using FIFO. b. Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. c. Compute the gross profit for each method.