Tiago makes three models of camera lens. Its product mix and contribution margin per unit follow: Percentage of Unit sales Contribution Margin per unit Lens A Lens B Lens C 22% 37 41 $44 36 49 Required: 1. Determine the weighted-average contribution margin per unit. (Round your intermediate calculations and final answer to 2 decimal places.) Weighted Average CM per unit 2. Determine the number of units of each product that Tiago must sell to break even if fixed costs are $189,000. (Round intermediate calculations and final answers to the nearest whole number.) Units of A Units of B Units of C Units Units Units