Date Explanation Units Total Cost Unit Cost $108 Sept. 1 Inventory $1,296 Sept. 12 Purchases 111 4,995 Sept. 19 Purchases 112 5,712 Sept. 26 Purchases 2,147 Totals $14,150 (a) Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, e.g. 125. 153 and final answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST The ending inventory at September 30 (b) Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, e.g. 125,153 and final answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST Cost of goods sold $