isa's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Lisa's purchases of Xpert nowboards during September is shown below. During the same month, 123 Xpert snowboards were sold. Lisa's uses a periodic nventory system. Your answer is partially correct. Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods. eTextbook and Media For both FIFO and LIFO, calculate the sum of ending inventory and cost of goods sold