R&R Tax Service offers tax and consulting services to individuals and small businesses. Data for fees and costs for three types of tax returns follow. Fixed costs total $91,840. Type of Return Easy Moderate Business Sales Mix Fee Charged 30% $ $ 70 10% 170 60% 410 Variable Cost per Return $ 40 100 250 (1) Determine the weighted-average contribution margin. Sales mix Contribution margin per return Total per unit 30% Easy Moderate 10% Business 60% Weighted average contribution margin (2) Determine the break-even point in units using the weighted average contribution margin. Numerator: 1 Denominator: 1 = Break Even Units Break even units 0 Units sales at the break-even point (3) Determine the number of units of each product that will be sold at the break-even point. Sales mix Number of units to break even. . Easy Moderate Business