Tiago makes three models of camera lens. Its product mix and contribution margin per unit follow: Lens A Lens B Lens C Percentage of Unit Sales 25% 35 40 Contribution Margin per Unit $ 41 33 46 Required: 1. Determine the weighted-average contribution margin per unit. 2. Determine the number of units of each product that Tiago must sell to break even if fixed costs are $184,000. 3. Determine how many units of each product must be sold to generate a profit of $69,000. Complete this question by entering your answers in the tabs below.