Complete Ex 7-18, "Variable costing income statement for a service company" for Underwater University on Page 339 of your textbook. Upload your Excel file using the following naming protocol: LastnameFirstnameEx 718 Note: You will need to download the attached Excel sheet to complete the assignment and then upload the completed income statement for credit. Week 4 Exercise 7 -18.xisx October 2 2023, 8:56 AM EX 7-18 Variable costing income statement for a service company Obj. 5 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 eredit hours. Depreciation is a fixed cost. Prepare a variable costing income statement showing the contribution margin and operating income for the Fall term. nswers are entered in the cells with gray backgrounds: alls with non-gray backgrounds are protected and cannot be edited. A antetisk (7) will appear to the nght of an incortect entry