Current Attempt in Progress Dorothy's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Dorothy's purchas of Xpert snowboards during September is shown below. During the same month, 126 Xpert snowboards were sold. Dorothy's use periodic inventory system. (a) Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods. eTextbook and Media Attempts: 0 of 1 used (b) The parts of this question must be completed in order. This part wall be available when you complete the part above