Required information

$[$The following information applies to the questions displayed below.$]$

Trey Monson starts a merchandising business on December $1$ ard enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December $15,$ Monson sells $15$ units for $$34$ each.

Purchases on December $7$

Purchases on December $14$

Purchases on December $21$

units@$$20\mathrm{.}00$ cost

units@$$26\mathrm{.}00$ cost

units@$$28\mathrm{.}00$ cost

Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. Note: Round your per unit costs to $2$ decimal places.