Perpetual inventory using FIFO

Beginning inventory, purchases, and sales data for DVD players are as follows:

Nov. $1$ ?Inventory

$35$ ?units at $$80$

$10$ ?Sale

$28$ ?units

$15$ ?Purchase

$15$ ?units at $$85$

Sale

$16$ ?units

$24$ ?Sale

$4$ ?units

$30$ ?Purchase

$36$ ?units at $$89$

The business maintains a perpetual inventory system, costing by the first$-$in$,$ ?first$-$out method. column and in the Inventory Unit Cost column.

First$-$in$,$ ?First$-$out Method DVD Players