Sarah's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Sarah's purchases of Xpert snowboards during September is shown below. During the same month, 124 Xpert snowboards were sold. Sarah's uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1. Inventory 26 $97 $2,522 Sept. 12 Purchases: 45 104 4,680 Sept. 19 Purchases 20 106 2,120 Sept. 26 Purchases 50 107 5.350 Totals 141 $14,672 Your answer is incorrect. 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 (a) SA $ $