Kingbird sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Kingbird's purchases of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold. Kingbird uses a periodic inventory system Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $80 $1,200 12 Purchase 45 82 3,690 19 Purchase 50 84 4.200 26 Purchase 20 85 1.700 Total 130 $10.790 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