Teal Mountain sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Teal Mountain's purchases of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold. Teal Mountain uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $120 $1,800 12 Purchase 45 122 5,490 19 Purchase 50 124 6,200 26 Purchase 20 125 2,500 Total 130 $15,990 Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. FIFO LIFO AVERAGE-COST Ending inventory at September 30 Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. FIFO LIFO Cost of goods sold LA AVERAGE-COST