Pronghorn Corp sells a snowboard, WhiteOut, that is popular with snowboard enthusiasts. Presented below is information relating to

Pronghorn Corp's purchases of WhiteOut snowboards during September. During the same month, $120$ WhiteOut snowboards were

sold at $$170$ each. Pronghorn Corp uses a periodic inventory system.

$($a$)$

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