Glassity Each cost as variable , fixed , or mixed . In making your Selection, be SURE to consult the Label to consider how land whether costs change in total or on a per- unit basis as the activity level cham Cost Type of cost Lab Supplies Variable* Physician's earnings Fixed Receptionist's Earnings Fixed Utilities Mixed Nurse'S earning s Mixed Property taxes Fixed Malpractice insurance Fixed Laundry Service Variable Paper for exam tables Variable* Janitor's earnings Mixed