Carter Co. sells two products, Arks and Bins. Last year, Carter sold 14,000 units of Arks and 56,000 units of Bins. Related data are: Product Unit Selling Price Unit Variable Cost Unit Contribution Margin Arks $120 $80 $40 Bins 80 60 20 Assuming that last year's fixed costs totaled $960,000, what was Carter Co.'s break-even point in units? a. 40,000 units b. 28,000 units c. 35,000 units d. 12,000 units