Monty sells a snowboard, EZslide, that is popular with snowboard enthusiasts. The following is information relating to Monty's beginning inventory and purchases of EZslide snowboards during September. During the same month, 100 EZslide snowboards were sold. Monty uses a periodic inventory system. Date Unit Cost Total Cost Sept. 1 Explanation Units Inventory 11 Purchases 45 $93 $ 1,023 96 4,320 Sept. 12 Sept. 19 Purchases 50 97 4,850 Sept. 26 Purchases 21 98 2,058 Totals 127 $12,251 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.) FIFO LIFO Average-cost The ending inventory at September 30 $ $ Cost of goods sold $ $ $