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	105	units	@ $40 per unit
March 5	Purchase	405	units	@ $45 per unit
March 9	Sales				425	units	@ $75 per unit
March 18	Purchase	130	units	@ $50 per unit
March 25	Purchase	210	units	@ $52 per unit
March 29	Sales				170	units	@ $85 per unit
	Totals	850	units		595	units

For specific identification, the March 9 sale consisted of 70 units from beginning inventory and 355 units from the March 5 purchase; the March 29 sale consisted of 45 units from the March 18 purchase and 125 units from the March 25 purchase.

4. 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