Mazoon Company has information on its revenue and costs is as follows: Selling price per unit $90; Variable costs per unit includes: Direct material $15, Direct manufacturing labor $12, Manufacturing overhead $7, and Selling costs $6; Annual fixed costs $70,000. What is the contribution margin percentage? a. 44.4% b. O 62% C. O 55.6% d. None of the given answers e. O 70%