Chilton, Inc. sold 12,900 units last year for $21 each. Variable costs per unit were $3.00 for direct materials. $3.10 for direct labor, and $3.50 for variable overhead. Fixed costs were $60.500 in manufacturing overhead and $41.300 in nonmanufacturing costs a. What is the total contribution margin? (Round your intermediate calculations to 2 decimal places.) Total Contribution Margin b. What is the unit contribution margin? (Round your answer to 2 decimal places,) Unit Contribution Margin c. What is the contribution margin atio? (Round your intermediate calculations and tinat