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 $67.600. Variable Cost Type of Return Sales Mix Fee Charged per Return Easy $ 50 Moderate 190 110 Business 460 280 (1) Determine the weighted-average contribution margin. Weighted-average contribution margin (2) Determine the break-even point in units using the weighted-average contribution margin. Numerator: Denominator: = Break Even Units Break even units (3) Determine the number of units of each product that will be sold at the break-even point. Easy units Moderate units Business units