Splish Brothers sells a snowboard, EZslide, that is popular with snowboard enthusiasts. The following is information relating to Splish Brothers's beginning inventory and purchases of EZslide snowboards during September. During the same month, 107 EZslide snowboards were sold. Splish Brothers uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 13 598 $1.274 Sept. 12 Purchases 44 101 4,444 Sept. 19 Purchases 52 102 5,304 Sept. 26 Purchases 20 103 2,060 Totals 129 $13.082 Compute the ending inventory at September 30 and the cost of goods sold using the FIFO, LIFO, and average-cost methods. (Round per unit cost to 3 decimal places, eg. 15.647 and final answers to O decimal places, eg. 5,125.) The ending inventory at September 30 Cost of goods sold FIFO LIFO Average-cost