Exercise 6-4 Waterway Corp, sells a snowboard, EZslide, that is popular with snowboard enthusiasts, Below is information relating to Waterway Corp.'s purchases of EZside snowboards during September. During the same month, 94 EZslide snowboards were sold. Waterway Corp. uses a periodic inventory system. Explanation Date Units Unit Cost Total Cost $ 1,391 13 $107 Sept. 1 Inventory Purchases 46 110 s.060 Sept. 12 Purchases 45 111 4,995 Sept. 19 2,240 Sept. 26 20 112 Purchases $13,686 124 Totals (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 anewers to 0 decimal places, e.g. 125.) AVERAGE-COST FIFO LIFO The ending inventory at September 30 (b) Compute the cost of goods soid at September 30 using the FIFO, IFO and average-cost methods (Round average cost per unit to 3 decimal places, eg. 125.153 and final answers to 0 decimal places, e. 125.) AVERAGE-COST LIFO FIFO Cost of goods sold Open Show Work e ir wn would ike to Shew Work for this