Variabie Costing Income Statement for a Service Company The actual and pianned data for Erosdwater Institute 8 . Technical 5 chool for the fall term were as foliows: regrstraton, records, and merkebing costs vary by the number of enrolied students, while instructional costs vary by the number of credit hours, Depreciation is a fixed cest. Prepare a variable costing income statement shoming the contribution margin and operating incoene for the fall term