How would I solve this? This is managerial accounting. Thanks in advance!

Instructional Instructional Accounting Business Revenues 500,000 $ 1,000,000 Operating Expenses 250,000 $ 550,000 Income before Service Charges FORMULA 1 FORMULA 2 Investment 300,000 $ 500,000 ROI before service charges FORMULA 3 FORMULA 4 Number of professors 5 10 Number of students in program 200 500 Payroll Advising (Driver is # of (Driver is # of professors) students) Service department expenses $ 100,000 $ 200,000 Service department charge rate FORMULA 5 FORMULA 6 Instructional Instructional Accounting Business Revenues 500,000 $ 1,000,000 Operating expenses 250,000 550,000 Income before service charges 250,000 450,000 Service charges: Payroll FORMULA 7 FORMULA 8 Advising FORMULA 9 FORMULA 10 Income from operations FORMULA 11 FORMULA 12 ROI after service charges FORMULA 13 FORMULA 14