To more efficiently manage its inventory, Telnex Corporation maintains its internal inventory records using first$-$in$,$ first$-$out $($FIFO$)$ under a perpetual inventory system. The following information relates to its inventory during the year:

January $1$ Beginning inventory$-28,000$ units.

February $12$ Purchased $78,000$ units for $$13\mathrm{.}30$ each.

April $30$ Sold $50,000$ units for $$20\mathrm{.}80$ each.

July $22$ Purchased $58,000$ units for $$13\mathrm{.}60$ each.

September $9$ Sold $78,000$ units for $$20\mathrm{.}80$ each.

November $17$ Purchased $48,000$ units for $$14\mathrm{.}00$ each.

December $31$ Ending inventory$-84,000$ units.

Required: