Exercise 6-4 Splish Brothers Inc. sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Splish Brothers Inc.'s purchases of EZslide snowboards during September. During the same month, 103 EZslide snowboards were sold. Splish Brothers Inc. uses a periodic inventory systenm Unit Cost Total Cost Explanation Inventory Purchases Purchases Purchases Totals Units Date Sept. 1 Sept. 12 Sept. 19 Sept. 26 $102 105 106 107 $1,224 4,725 5,300 2,033 $13,282 12 19 126 (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, e.g 125.153 and final answers to 0 decimal places, e.g. 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, e.g 125.153 and final answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST Cost of goods sold