Novak Corp. sells a snowboard, EZslide, that is popular with snowboard enthusiasts, Below is information relating to Novak Corp's purchases of EZslide snowboards during September. During the same month, 107 EZslide snowboards were sold. Novak Corp. uses a periodic inventory system. (b) Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, es. 125.153 and final answers to 0 decimal places, eg. 125.)