Problem $6-2$AA $($Algo$)$ Periodic: Alternative cost flows LO P$3$

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

Warnerwoods Company uses a periodic inventory system. It entered into the following purchases and sales transactions

for March.

For specific identification, units sold include $40$ units from beginning inventory, $400$ units from the March $5$ purchase, $60$

units from the March $18$ purchase, and $140$ units from the March $25$ purchase.

Problem $6-2$AA $($Algo$)$ Part $4$

Compute gross profit earned by the company for each of the four costing methods.

Note: Round your average cost per unit to $2$ decimal places and final answers to nearest whole dollar.