13 Chilton, Inc. sold 11,000 units last year for $20 each. Vanable costs per unit were $4 for direct materiais, $1.50 for direct labor, and $2.50 for variable overhead. Fixed costs were $60,000 in manufacturing overhead and $40,000 in nonmanufacturing costs a. What is the total contribution margin? Tutar Conttuubon Margin Check my work b. What is the unit contribution margin? Unit Contntation Margi c. What is the contribution margin ratio? Contribution Margin Ratio % d. If sales increase by 2,000 units, by how much will profits increase? Profits Increme