Sales Mix and Break-Even Analysis Heyden Company has fixed costs of $878,400. The unit selling price, variable cost per unit, and contribution margin per unit for the company's two products follow: Product Selling Price Variable Cost per Unit Contribution Margin per Unit QQ $320 $160 $160 ZZ 210 130 80 The sales mix for Products QQ and ZZ is 20% and 80%, respectively. Determine the break-even point in units of QQ and ZZ. If required, round your answers to the nearest whole number. a. Product QQ units b. Product ZZ units