Tiago makes three models of camera lens. Its product mix and contribution margin per unit follow: Percentage of Unit sales Lens A Lens B 26% 42 Lens C 32 Contribution Margin per unit $40 32 45 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 $196,000. 3. Determine how many units of each product must be sold to generate a profit of $77,000. Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3