Tiago makes three models of camera lens. Its product mix and contribution margin per unit follow. Percentage of Unit Contribution Margin Lens A Lens B Lens C Required: Sales 28% 44 28 per Unit $ 31 23 36 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 $182,000. 3. Determine how many units of each product must be sold to generate a profit of $70,000.