Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 12 $105 $1,260 Sept. 12 Purchases 50 108. 5,400 Sept. 19 Purchases 57 57 109 6,213 Sept. 26 Purchases 21 22 110 2,310 Totals 140 $15,183 (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 FIFO LIFO AVERAGE-COST REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September. During the same month, 109 snowboards were sold. REI uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 12 $105 $1,260 Sept. 12 Purchases 50 108 5,400 Sept. 19 Purchases 57 109 6,213 Sept. 26 Purchases 21 110 2,310 Totals 140 $15,183 (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 FIFO LIFO $ AVERAGE-COST