Compute the cost of goods sold for the month using the FIFO, LIFO, and average$-$cost methods.

$($Round average cost per unit to $3$ decimal places, e$.$g$.125\mathrm{.}153$ and final answers to $0$ decimal places, e$.$g$.$

$125.)$REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during

September. During the same month, $100$ snowboards were sold. REI uses a periodic inventory system.