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Barbara's Boards sells a snowboard, Xpert that is popular with snowboard enthusiasts. Information relating to Barbara's purchases of Xpert snowboards during September is shown below. During the same month, 121 Xpert snowboards were sold. Barbara's uses a periodic inventory system Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 27 597 $ 2,619 Sept. 12 Purchases 45 105 4.725 Sept. 19 Purchases 28 20 107 2.140 Sept. 26 Purchases SO 108 5.400 Totals 142 $14,884 (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 S $ Cost of goods sold 5 e Textbook and Media Submit Answer Save for Laser Attempts: 0 of 1 used (b) For both FIFO and LIFO, calculate the sum of ending inventory and cost of goods sold FIFO LIFO $ The sum of ending inventory and cost of goods sold