Pepperoni Company wants to know how many units it must sell to earn an after- tax profit of $30,000, given the information below: Selling price per unit Contribution margin percent Income tax rate Total fixed costs $20 40% 40% $120,000 Select one: O a. 22,250 units. Ob. 20,250 units. . Oc. 19,250 units. O d. 23,250 units. O e. 21,250 units