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[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.

Date	Activities	Units Acquired at Cost			Units Sold at Retail
March 1	Beginning inventory	110	units	@ $45 per unit
March 5	Purchase	410	units	@ $50 per unit
March 9	Sales				430	units	@ $80 per unit
March 18	Purchase	140	units	@ $55 per unit
March 25	Purchase	220	units	@ $57 per unit
March 29	Sales				180	units	@ $90 per unit
	Totals	880	units		610	units

For specific identification, units sold include 60 units from beginning inventory, 370 units from the March 5 purchase, 50 units from the March 18 purchase, and 130 units from the March 25 purchase.

4. Compute gross profit earned by the company for each of the four costing methods. (Round your average cost per unit to 2 decimal places and final answers to nearest whole dollar.)