Tiago makes three models of camera lens. Its product mix and contribution margin per unit follow Lens A Lens B Lens C 28% 38 34 $33 25 38 Required: 1. Determine the weighted-average contribution margin per unit (Round your intermediate calculations and final answer to 2 decimal places.) Average C per unt 2. Determine the number of units of each product that Tiago must sell to break even if fited costs are $191,000 (Round intermediate calculations and final answers to the nearest whole number) Unts of A Unts of B Unts of C Units Units Unts 3. Determine how many units of each product must be sold to generate a proft of $70.000 (Round intermediate calculations and inal answers to the nearest whole number.) Unts of A Unts of B unts of C Unts Units Units