REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September. During the same month, 105 snowboards were sold. REI uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $102 $1,530 Sept. 12 Purchases 45 104 4,680 Sept. 19 Purchases 50 106 5,300 Sept. 26 Purchases 20 107 2,140 Totals 130 $13,650 (a) Compute the ending inventory at September 30 using FIFO, LIFO, and average-cost. (Round the average unit cost to 3 decimal places, e.g. 123.234 and final answers to O decimal places, e.g. 125.) Ending inventory at September 30 $ CA FIFO LIFO $ AVERAGE-COST