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Hank's Helpers provides locksmith services. One type of service call is to evaluate private residences for security concerns and make recommendations for a safety plan. Use the data below to determine the company's total contribution margin, contribution margin per service call, and contribution margin ratio when 200 service calls are made in the month of June. (Click the icon to view the data.) * Data Table $ Service Revenue Variable Costs 150 per service call 60 per service call 17,000 per month Fixed Costs Print Print Done Done Select the formula labels needed to compute the contribution margin. Then, complete the table to calculate the contribution margin per service call, then the company's total contribution margin. Per call Service Revenue 150 200 calls 30000 12000 Variable Costs 60 18000 Contribution Margin Select the formula to calculate the contribution margin ratio. Contribution Margin Ratio - Contribution Margin / Service Revenue The contribution margin ratio is 60%