Elsa's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Elsa's purchases of Xpert snowboards during September is shown below. During the same month, 121 Xpert snowboards were sold. Elsa's uses a periodic inventory system. Units $ 2,522 4.590 2,080 $ 97 Sept. 1 Sept. 12 Sept. 19 Sept. 26 Inventory Purchases Purchases Purchases Totals 104 Instructions (a) Compute the ending inventory at September so and cost of goods sold using the FIFO and LIFO methods. Prove the amount allocated to cost of (b) For both FIFO and LIFO, caleulate the sum of ending inventory and cost of goods sold. What do you notice about the answers you found for method? Compute inventory and cost of goods sold using FIFO and LIFO