E6-4 Zhu Boards sells a snowboard, oute inventory and cost of goods sold using FIFO and average cost. (LO2) as sells a snowboard, Xpert, that is popular with snowboard enthusiasts. elating to Zhu's purchases of Xpert snowboards during September is shown page. During the same month, 121 Xpert snowboards were sold. Zhu's uses a Xpert snowboards a on the next page. During the same mor periodic inventory system. sere sold. Zhu Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 23 HK$ 970 HK$ 22,310 Sept. 12 Purchases 45 1,020 45,900 Sept. 19 Purchases 1,040 20,800 Sept. 26 Purchases 1,050 46,200 Totals HK$135,210 Instructions (a) Compute the ending inventory at September 30 and cost of goods sold using the FIFO and average-cost methods. Prove the amount allocated to cost of goods sold under each method. (b) For both FIFO and average-cost, calculate the sum of ending inventory and cost of goods sold. What do you notice about the answers you found for each method? . ..b following for the 0113 20 Compute inventory and cost Pd