Wildhorse Co. sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Wildhorse Co.'s purchases of EZslide snowboards during September. During the same month, 107 EZslide snowboards were sold. Wildhorse Co.uses a periodic inventory system Units 15 Date Sept. 1 Sept. 12 Sept. 19 Sept. 26 Unit Cost $110 113 Explanation Inventory Purchases Purchases Purchases Totals Total Cost $1,650 5,537 5,814 2.875 $15,876 49 51 25 140 114 115 (a) Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, e.g. 125.153 and final answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST $ $ The ending inventory at September 30 (b) Compute the cost of goods sold at September 30 using the FIFO, LIFO and average cost methods. (Round average cost per unit to 3 decimal places, e.g. 125.153 and final answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST $ $ Cost of goods sold