I need help with computing the gross profit

Warnerwoods Company uses a perpetual 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

110

units

@ $51.20 per unit

Mar.

5

Purchase

230

units

@ $56.20 per unit

Mar.

9

Sales

270

units

@ $86.20 per unit

Mar.

18

Purchase

90

units

@ $61.20 per unit

Mar.

25

Purchase

160

units

@ $63.20 per unit

Mar.

29

Sales

140

units

@ $96.20 per unit

Totals

590

units

410

units

value 12.50 points Problem 5-1A Part 4 Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 70 units from beginning inventory and 200 units from the March 5 purchase, the March 29 sale consisted of 50 units from the March 18 purchase and 90 units from the March 25 purchase. (Round weighted average cost per unit to two decimals.) 4. Weighted AverageIdentification Specific FIFO LIFO Sales Less: Cost of goods sold Gross profit