Exercise 6-4 (Part Level Submission) Linda's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Linda's purchases of Xpert snowboards during September is shown below. During the same month, 123 Xpert snowboards were sold. Linda's uses a periodic inventory system. Units 27 Unit Cost $100 Date Sept. 1 Sept. 12 Sept. 19 Sept. 26 105 Explanation Inventory Purchases Purchases Purchases Totals 46 20 106 110 Total Cost $ 2,700 4,830 2,120 5,610 $15,260 52 144 (a) Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods. FIFO LIFO The ending inventory at September 30 Cost of goods sold