Novak Corp, sells 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 Explanation Units Unit Cost Total Cost Sept. 1. Inventory 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 (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, eg. 125.153 and final answers to O decimal places, e.g. 125.) The ending inventory at FIFO LIFO AVERAGE-COST