5 5015 Tree Seedlings has the following current-year purchases and sales for ts only product. Dete Jas. Activities Beginning Leventory Jay, 3 Sales Feb. 20 Purchase Feb. 25 Sele June 20 Purchase Nev. 6 Sales Nev. 29 Purchase Units Accndred at Cast Units sold at Retail 255 120 3558 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 margin for each method. Check my work