If you wish to change staff printing to departments or faculties, then you should make use of the shared accounts feature. A shared account represents the department, faculty or cost center. When the staff member prints they are prompted to select the account they wish to charge the printing to.
You can then run one of the many shared account reports each month to track how much printing was charged to each account. You can even schedule the report to be automatically emailed monthly. See the manual chapter on scheduled reports here.
If you are not interested in department or faculty accounting then you can just track usage of individual staff members. This can be done by running one of the many user printing reports. If your staff members all belong to a “Staff” group, then you can use one of the group/user reports that show all printing activity for a particular group of users.