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	185	units	@ $75 per unit
March 5	Purchase	485	units	@ $80 per unit
March 9	Sales				505	units	@ $110 per unit
March 18	Purchase	290	units	@ $85 per unit
March 25	Purchase	370	units	@ $87 per unit
March 29	Sales				330	units	@ $120 per unit
	Totals	1,330	units		835	units

For specific identification, units sold include 40 units from beginning inventory, 465 units from the March 5 purchase, 125 units from the March 18 purchase, and 205 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.)