7. (15 pts) A university has two colleges and two service departments with the pertinent information shown in the table. Public safety costs are allocated on the basis of library costs on the basis of students. rooms and Public Safety Library Liberal Arts Business Direct dept. costs $1,500,000 S1,000,000 $10,000,000 $8,000,000 Students 2,0001,500 60 Rooms 100 a) Allocate service department costs using the direct method. Allocate service department costs using the step-down method. Start with public safety. b)