Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $118 $1,770 12 Purchase 45 120 5.400 19 Purchase 50 122 6,100 26 Purchase 20 123 2,460 Total 130 $15,730 Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. Ending inventory at September 30 FIFO LIFO Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. Cost of goods sold FIFO LIFO MacBook Pro AVERAGE-COST AVERAGE-COST