Exercise 6-4 Sherper's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Sherper's purchases of Xpert snowboards during September is shown below. During the same month, 340 Xpert snowboards were sold. Sherper's uses a periodic inventory system Units Explanation Inventory Purchases Purchases Purchases Unit Cost Total Cost ate Sept. 1 Sept. 12 Sept. 19 Sept. 26 65 126 56 124 371 $101 104 107 110 $ 6,565 13,104 5,992 13,640 $39,301 Totals (a) Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods IF FO The ending inventory at September 30 Cost of goods sold (b) For both FIFO and LIFO, calculate the sum of ending inventory and cost of goods sold FIFO IFO The sum of ending inventory and cost of goods sold