Using variable costing, service company Professional Pool Cleaning Service provides pool cleaning services to residential customers. The company has three employees, each assigned to specific customers. The company considers each employees territory as a business segment. The company incurs variable costs that include the employees' Wages, pool chemicals, and gas for the service vans. Fixed costs include depreciation on the service vans. Following is the income statement for the month of July: Requirements 1. Calculate the contribution margin ratio for each business segment. 2. The business segments had the following numbers of customers: Birman, 60; Meech, 70; and Frond, 40. Compute the service revenue per customer, variable cost per customer, and contribution margin per customer for each business segment. 3. Which business segment was most profitable? List some possible reasons why this segment was most profitable. How might the various reasons affect the company in the long term? PROFESSIONAL POOL CLEANING SERVICE Income Statement For the Month Ended July 31, 2018 Total Service Revenue Birman Meech Frond $3,000 $ 3,500 $2,000 1,500 2.450 1,200 $ 8,500 Variable costs 5,150 Contribution Margin 1,500 1,050 800 3,350 Fixed Costs 3,000 $ 350 Operating Income