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 14 $110 $1,540 Sept. 12 Purchases 50 113 5,650 Sept. 19 Purchases 54 114 6,156 Sept. 26 Purchases 22 115 2,530 Totals 140 $15,876 (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 O decimal places, e.g. 125.) Ending inventory at September 30 +A $ FIFO LIFO $ AVERAGE-COST