Variable Costing Income Statement for a Service Company The actual and planned data for Underwater University for the Fall term were as follows: Registration, records, and marketing costs vary by the number of enrolled students, while instructional costs vary by the number of credit hours. Depreciation is a fixed cost. Prepare a variable costing income statement showing the contribution margin and operating income for the Fall term. Underwater University Variable Costing Income Statement For the Fall Term Revenue Variable costs: Registration, records, and marketing costs \$ Instructional costs Total variable costs Contribution margin. Depreciation on classrooms and equipment Operating income