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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	130	units	@ $65 per unit
March 5	Purchase	430	units	@ $70 per unit
March 9	Sales				450	units	@ $100 per unit
March 18	Purchase	180	units	@ $75 per unit
March 25	Purchase	260	units	@ $77 per unit
March 29	Sales				220	units	@ $110 per unit
	Totals	1,000	units		670	units

For specific identification, the March 9 sale consisted of 70 units from beginning inventory and 380 units from the March 5 purchase; the March 29 sale consisted of 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.