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 Sept. 1 12 Units 15 Explanation Inventory Purchase Purchase Purchase Unit Cost $120 122 45 Total Cost $1,800 5,490 6,200 2,500 $15,990 19 50 124 26 20 125 Total 130 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 AVERAGE-COST Cost of goods sold $ At $