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 28% $38 Lens B 41 30 Lens C 31 43 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 $187,000. (Round intermediate calculations and final answers to the nearest whole number.) Units of A Units Units Units of B Units of C Units 3. Determine how many units of each product must be sold to generate a profit of $81,000. (Round Intermediate calculations and final answers to the nearest whole number.) Units of A Units Units of B III Units Units Units of C