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

for March.

Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March $9$ sale

consisted of $80$ units from beginning inventory and $340$ units from the March $5$ purchase; the March $29$ sale consisted of $40$ units from

the March $18$ purchase and $120$ units from the March $25$ purchase. $($Round weighted average cost per unit to two decimals.$)$