Pronghorn Corp sells a snowboard, EZslide that is popular with snowboard enthusiasts. Below is information relating to Pronghom Corp's purchases of Ezslide snowboards curing September. During the same month, 100 EZslide snowboards were sold. Pronghorn Corpuses a periodic inventory system. Date Unit Cost Explanation Units Inventory 13 Total Cost $ 1.495 Sept. 1 $115 Sept. 12 Purchases 49 118 5.782 Sept. 19 Purchases 54 119 6,426 Sept. 26 Purchases 24 120 2.880 Totals 140 $16,583 (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, eg. 125.153 and final answers to decimal places, eg. 125.) FIFO LIFO AVERAGE-COST The ending inventory at September 30 (b) Compute the cost of goods sold at September 30 using the FIFO, UFO and average-cost methods. (Round average cost per unit to 3 decimal places, es. 125.153 and final answers to decimal places, s. 125.) FIFO LIFO AVERAGE COST $ Cost of goods sold $