Altira Corporation provides the following information related to its inventory during the month of August $2024$:

August $1$ Inventory on hand$3,000$ units; cost $$7\mathrm{.}10$ each.

August $8$ Purchased $15,000$ units for $$6\mathrm{.}50$ each.

August $14$ Sold $12,000$ units for $$13\mathrm{.}00$ each.

August $18$ Purchased $9,000$ units for $$6\mathrm{.}00$ each.

August $25$ Sold $11,000$ units for $$12\mathrm{.}00$ each.

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

August $31$ Inventory on hand$9,000$ units.