Exercise 6-5 Wildhorse's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Wildhorse's purchases of Xpert snowboards during September is shown below. During the same month, 321 Xpert snowboards were sold. Wildhorse's uses a periodic inventory system. Date Sept. 1 Sept. 12 Purchases Sept. 19 Purchases Sept. 26 Purchases Explanation Units Unit Cost Total Cost 6,900 12,376 S,724 14,630 $39,630 69 119 53 133 374 $100 104 108 110 Inventory Totals Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods. FIFO LIFO The ending inventory at September 30 s Cost of goods sold For both FIFO and LIFO, calculate the sum of ending inventory and cost of goods sold. FIFO LIFO The sum of ending inventory and cost of goods sold s