Campbell, Incorporated, sold 100,000 units last year for $6.00 each. Variable costs per unit were $1.80 for direct materials, $2.10 for direct labor, and $0.30 for variable overhead. Fixed costs were $38,000 in manufacturing overhead and $26,000 in nonmanufacturing costs. Required: a. What is the total contribution margin? b. What is the unit contribution margin? Note: Round your answer to 2 decimal places. c. What is the contribution margin ratio? Note: Round your intermediate calculations to 2 decimal places. d. If soles increase by 32,000 units, by how much will profits increase? Note: Round your intermediate calculations to 2 decimal places