Required information

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

Trey Monson starts a merchandising business on December $1$ and 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 $21$

$10$ units @ $$20\mathrm{.}00$ cost $20$ units @ $$26\mathrm{.}00$ cost

$15$ units @ $$28\mathrm{.}00$ cost

Of the units sold, $8$ are from the December $7$ purchase and $7$ are from the December $14$ purchase. Determine the costs assigned to ending inventory when costs are assigned basted on specific identification.