Hemming Co. reported the following current-year purchases and sales for its only product. Date Activities Units Acquired at Cost Units Sold at Retail Jan. 1 Beginning inventory 220 units @ $10.80 = $ 2,376 Jan. 10 Sales 190 units @ $40.89 Mar. 14 Purchase 330 units @ $15.80 = 5,214 Mar.15 Sales 280 units @ $40.89 July30 Purchase 420 units @ $20.80 = 8,736 Oct. 5 Sales 390 units @ $40.80 Oct.26 Purchase 120 units @ $25.80 = 3,096 Totals 1,098 units $19,422 860 units Required: Hemming uses a perpetual inventory system. 1. Determine the costs assigned to ending inventory and to cost of good sold using FIFO. 2. Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. 3. Compute the gross margin for FIFO method and LIFO method