also computing the average cost method

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. (a) Compute the ending inventory at September 30 and cost of goods sold using the FIFO and LIFO methods