Required information The following information applies to the questions displayed below.) Tree Seedlings has the following current-year purchases and sales for its only product. Units sold at Units Required at Cout 40 units $2 - 80 30 units $8 70 units $3 - $210 60 units 88 Date Ativities Jan. 1 Beginning inventory Jan. 3 Sales Feb. 14 Purchase Yab. 15 Sales June 30 Purchase Nov. 6 Sales Nov. 19 Purchase Totals 90 units $4 - $360 86 units $8 20 units $5 - $100 220 units $750 176 units Required: The company uses a periodic 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