Novak Corpsells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Novak Corp's purchases of EZslide snowboards during September. During the same month 107 EZslide snowboards were sold. Novak Corp, uses a periodic inventory system Date Units Unit Cost Total Cost Explanation Inventory Sept. 1 13 $117 $1,521 Sept. 12 Purchases 46 120 5,520 Sept 19 Purchases 60 121 7.260 Sept. 26 Purchases 21 122 2,562 Totals 140 $16,863 la) Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, eg 125 153 and final answers to decimal places, eg. 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 unit to 3 decimal places , es 125.153 and final answers to decimal places, eg. 125.) FIFO LIFO AVERAGE-COST Cost of goods sold