petual inventory using LIFO

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

Nov. $1$ Inventory $60$ units at $$81$

$10$ Sale

$43$ units

$15$ Purchase

$73$ units at $$85$

$20$ Sale

$42$ units

$24$ Sale

$10$ units

$30$ Purchase

$24$ units at $$89$

he business maintains a perpetual inventory system, costing by the last$-$in$,$ first$-$out method.

petermine the cost of goods sold for each sale and the inventory balance after each sale, presenting the data in the form illustrated in Exhibit $4.$ Under LIFO, if units are in fventory at two different costs, enter the units with the HIGHER unit cost first in the Cost of Goods Sold Unit Cost column and LOWER unit cost first in the Inventory Unit Cost column.