Helen's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Helen's purchases of Xpert snowboards during September is shown below. During the same month, 121 Xpert snowboards were sold. Helen's uses a periodic inventory system. Date Units Total Cost Unit Cost $97 26 Explanation Inventory Purchases Purchases Purchases 45 Sept. 1 Sept. 12 Sept. 19 Sept. 26 104 $ 2,522 4,680 2,120 5,350 106 20 50 107 Totals 141 $14,672 (a) 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 $ $ Cost of goods sold $ $ e Textbook and Media Save for Later Attempts: 0 of 3 used Submit