Hughes Company has foved costs of $3,565,000. 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 Model 94 $1,600 $960 $640 Model 81 1,000 800 200 The sales mix for products Model 94 and Model 81 is 25% and 75%, respectively. Determine the break-even point in units of Model 94 and Model 81 of the overall (total) product, L. a. Product Model 94 units b. Product Model 81 units