ampbell, Incorporated, sold 130,000 units last year for $3.00 each. Variable costs per unit were $.90 for direct materials, $0.60 for rect labor, and $0.15 for variable overhead. Fixed costs were $32,000 in manufacturing overhead and $32,000 in nonmanufacturing equired: What is the total contribution margin? What is the unit contribution margin? Note: Round your onswer to 2 decimal places. c. What is the contribution margin ratio? Note: Round your intermediate calculations to 2 decimal places. d. If sales increase by 20,000 units, by how much will profits increase? Note: Round your intermediote colculations to 2 decimal places