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

for March.

For specific identification, units sold include $70$ units from beginning inventory, $380$ units from the March $5$ purchase, $70$

units from the March $18$ purchase, and $150$ units from the March $25$ purchase.

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.