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

Mar.

1

Beginning inventory

130

units

@ $65 per unit

Mar.

5

Purchase

430

units

@ $70 per unit

Mar.

9

Sales

450

units

@ $100 per unit

Mar.

18

Purchase

180

units

@ $75 per unit

Mar.

25

Purchase

260

units

@ $77 per unit

Mar.

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.

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.)