eBook Identify Activity Bases For a major university, select the activity base most appropriate for each cost listed below. An activity base may be used more than once or not used at all Cost: Activity Base: 1. Instructor salaries 2. Admissions office salaries 3. Student records office salaries 4. Financial aid office salaries 5. Housing personnel wages 6. Office supplies se ost appropriate for each cost listed below. An activity base Activity Base: Number of enrollment applications Number of students Student credit hours Number of enrolled students and alumni Number of financial aid applications Number of students living on campus