The local ice cream shop sells single-scoop cones. The store employs a manager plus one full-time and two part-time employees, and also incurs costs for labor, rent, and insurance. Information concerning operations follows. Selling price of single-scoop cones $2.00 Unit cost of ice cream per scoop 0.25 Unit cost of cone 0.05 Montlhy labor costs 3,500 Monthly rent and insurance cost 500 What is the contribution margin per unit of a single-scoop cone?