Chilton, Ine. 5old 12,900 units last year for $20 each. Variable costs per unit were $3.00 for direct materiais, $2.90 for direct labor, and $4.10 for variable overhead. Fixed costs were $62,000 in manufacturing overhead and $41,700 in nonmanufacturing costs. a. What is the total contribution margin? (Round your intermediate calculations to 2 decimal places.) b. What is the unit contribution margin? (Round your answer to 2 decimal places.) c. What is the contribution margin ratio? (Round your intermediate calculations and final answer to 2 decimal places.) d. If saies increase by 2,120 units, by how much will profits increase? (Round your intermediate caleulation to 2 decimal places and final answer to the nearest doliar amount)