Altira Corporation provides the following information related to its merchandise inventory during the month of August $2021$:

Aug$\mathrm{.}1$ Inventory on hand$2,000$ units; cost $$5\mathrm{.}30$ each.

Aug$\mathrm{.}8$ Purchased $8,000$ units for $$5\mathrm{.}50$ each.

Aug$\mathrm{.}14$ Sold $6,000$ units for $$12\mathrm{.}00$ each.

Aug$\mathrm{.}18$ Purchased $6,000$ units for $$5\mathrm{.}60$ each.

Aug$\mathrm{.}25$ Sold $7,000$ units for $$11\mathrm{.}00$ each.

Aug$\mathrm{.}28$ Purchased $4,000$ units for $$5\mathrm{.}80$ each.

Aug$\mathrm{.}31$ Inventory on hand $-7,000$ units