Betty's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Betty's purchases of Xpert snowboards during September is shown below, During the came month, 123 Xpert snowbourds were sold, Betty's uses a periodic inventory system. Compute the ending imventory at September 30 and cost of goods sold using the FIFO and LIFO methods. For both FIFO and UFO, Calculate the sum of ending inventory and cost of goods sold