Current Attempt in Progress Sandhill Co sells a snowboard, EZ slide, that is popular with snowboard enthusiasts. Below is information relating to Sandhill Ca's purchases of Eslide snowboards during September. During the same month, 107 EZ slide snowboards were sold. Sandhill causes a periodic inventory system Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 11 $105 $ 1.155 Sept. 12 Purchases 108 4.752 Sept. 19 Purchases 54 109 5.886 Sept. 26 Purchases 20 110 2.200 Totals 129 $13,993 (a) Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, s. 125,153 and final answers to decimal places, s. 125) FIFO LIFO AVERAGE-COST The ending inventory at September 30 (b) Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per un to 3 decimal places, s. 125.153 and final answers to decimal places, s. 125) FIFO LIFO AVERAGE-COST Cost of goods sold $