Julie's Nail Salon recently had one of its employees quit to pursue another career. Julie no longer has enough employees to handle the normal customer load and will have to cut back on appointments until a replacement is found. Which of the following is most relevant to the decision on which services to provide? A) The contribution margin per unit for each of the services B) The contribution margin per labor hour for each of the services provided C) The sales price per unit for each of the services OD) The cost of materials per unit for each of the services