on Help E21-24 (similar to) Harper's Helpers provides locksmith services. One type of service call is to evaluate private residences for security concerns and make recommendations for any plan. Use the data below to determine the company's total contribution margin contribution margin per service call, and contribution margin ratio when 240 service 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 cal, then the company's total contribution margin Per call 240 calle Service Revenue $ 150 Variable costs Data Table $ 135 Contribution Margin 15 Service Revenge 5 Variatie Costs Fred Costs 150 per service 15 per service 31 000 per month Done Enter any number in the edit fields and then click Check Answer Check Awe Clear All 2 parts remaining