E6-4 Linda's Boards sells a snowboard, Xpert, that is popular with snowboard enthusi- asts. Information relating to Linda's purchases of Xpert snowboards during September is shown below. During the same month, 121 Xpert snowboards were sold. Linda's uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 26 $ 97 $ 2,522 Sept. 12 Purchases 45 102 4,590 Sept. 19 Purchases 20 104 2,080 Sept. 26 Purchases 50 105 5,250 Totals 141 $14,442 Instructions (a) Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods. Prove the amount allocated to cost of goods sold under each method. (b) For both FIFO and LIFO, calculate the sum of ending inventory and cost of goods sold. What do you notice about the answers you found for each method? *E6-17 Information about Linda's Boards is presented in E6-4. Additional data regarding Linda's sales of Xpert snowboards are provided below. Assume that Linda's uses a perpetual inventory system. Date Units Unit Price Total Revenue Sept. 5 Sale 12 $199 $ 2,388 Sept. 16 Sale 50 199 9,950 Sept. 29 Sale 59 209 12,331 Totals 121 $24,669 Instructions (a) Compute ending inventory at September 30 using FIFO, LIFO, and moving-average cost. (b) Compare ending inventory using a perpetual inventory system to ending inventory using a periodic inventory system (from E6-4). (c) Which inventory cost fl ow method (FIFO, LIFO) gives the same ending inventory value under both periodic and perpetual? Which method gives different ending inven- tory values