Craigs Air Conditioning/Heating reported the following information: Revenues -$33,500 Variable manufacturing costs- $6,700 Variable nonmanufacturing...

Craigs Air Conditioning/Heating reported the following information:

Revenues -$33,500

Variable manufacturing costs- $6,700

Variable nonmanufacturing costs: $6,030

Fixed manufacturing costs-$ 4,690

Fixed nonmanufacturing costs- $4,020

a. compute contribution margin

b. compute contribution percentage

c. Compute gross margin

d. compute gross margin percentage

e. compute operating income