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 140 sorvice calls are made in the month of June Click the icon to view the data) 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 140 calls Data Table Contribution Margin Select the formula to calculate the contribution margin ratio Contribution Margin Ratio Service Revenue Variable Costs Fixed Costs $120 per service call 72 per service call 5,720 per month The contribution margin ratio is 90 Print Done