Skysong sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Skysong's purchases of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold. Skysong uses a periodic inventory system Date Sept. 1 12 Units 15 Explanation Inventory Purchase Purchase Purchase Total Unit Cost $114 116 118 45 19 Total Cost $1.710 5,220 5,900 2,380 $15,210 26 50 20 130 119 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