A company purchased inventory as follows:

$228$ units at $$6\mathrm{.}80$

$342$ units at $$7\mathrm{.}50$

The average unit cost for inventory is

$$$$7\mathrm{.}15.$

$$$$6\mathrm{.}80.$

$$$$7\mathrm{.}50.$

$$$$7\mathrm{.}22.$