Laura's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Laura's purchases of Xpert snowboards during September is shown below. During the same month, 120 Xpert snowboards were sold. Laura's uses a periodic inventory system. Compute the ending irventory at September 30 and cost of goods sold using the FIFO and LIFO methods. eTextbook and Media Attempts: 0 of 14 (b) For both FIFO and LIFO, calculate the sum of ending inventory and cost of goods sold