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

Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 90 units from beginning inventory and 220 units from the March 5 purchase; the March 29 sale consisted of 70 units from the March 18 purchase and 110 units from the March 25 purchase.

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