AAA Corporation sells two models of digital cameras with total fixed costs of $158,000. The sales mix of model A is 60% and model B is 40%. The variable cost of Model A is $100 per unit with a selling price of $270. The variable cost of Model B is $158 per unit with a selling price of $298. 1. What is the weighted-average unit contribution margin for AAA? 2. How many units of Model A would be sold at the break-even point