REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September. During the same month, 103 snowboards were sold. REI uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 10 $111 $1,110) Sept. 12 Purchases 56 114 6,384 Sept. 19 Purchases. 60 115 6,900 Sept. 26 Purchases 24 116 2,784 Totals 150 $17,178 (a) Compute the ending inventory at September 30 using FIFO, LIFO, and average-cost. (Round average cost per unit to 3 decimal places, e.g. 125.153 and final answers to 0 decimal places, e.g. 125.) Ending inventory at September 30 FIFO LIFO AVERAGE-COST