help please!

Kingbird sells a snowboard, EZslide, that is popular with snowboard enthusiasts. The following is information relating to Kingbird's purchases of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold. Kingbird uses a periodic inventory system. Compute the ending inventory at September 30 and the cost of goods sold using the FIFO. LIFO, and average-cost methods. (Round per unit cost to 3 decimal places, es. 15.647 and final answers to 0 decimal places, es. 5.125