of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold. Metlock uses a periodic Inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $108 $1.620 12 Purchase 45 110 4,950 19 Purchase 50 112 5,600 26 Purchase 20 113 2260 Total 130 $14,430 Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. Ending inventory at September 30 FIFO 2020 LIFO Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. FIFO Cost of goods sold $ LIFO AVERAGE-COST AVERAGE-COST