Sales Mix and Break-Even Analysis Heyden Company has fixed costs of $849,300. 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 $660 $420 $240 ZZ 460 400 60 The sales mix for Products QQ and ZZ is 30% and 70%, 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