Chilton. Inc. sold 11,000 units last year for S20 each. Variable costs per unit were $4 for direct materials. $1.50 for direct labor, and S2.50 for variable overhead. Fixed costs were $60,000 in manufacturing overhead and $40,000 in nonmanufacturing costs. What is the total contribution margin? What is the unit contribution margin? What is the contribution margin ratio? If sales increase by 2,000 units, by how much will profits increase