Brownie Enterprises started the period with $70$ units in beginning inventory that cost $$2\mathrm{.}70$ each. During the period, the company purchased inventory items as follows. Brownie sold $240$ units after purchase $3$ for $$10\mathrm{.}80$ each.

$\backslash$table$[[$Purchase$,$Number of Items,Cost$],[1,220,$$$3\mathrm{.}20$