Predetermined Factory Overhead Rate Reithofer Medical Center has a single operating room that is used by local physicians to perform surgical procedures. The cost of using the operating room is accumulated by each patient procedure and includes the direct materials costs (drugs and medical devices), physician surgical time, and operating room overhead. On January 1 of the current year, the annual operating room overhead is estimated to be: Disposable supplies Depreciation expense Utilities Nurse salaries Technician wages $340,000 64,000 26,000 312,400 131,200 $873,600 Total operating room overhead The overhead costs will be assigned to procedures, based on the number of surgical room hours. Reithofer Medical Center expects to use the operating room an average of down four weeks per year for general repairs. a. Determine the predetermined operating room overhead rate for the year eight hours per day, seven days per week. In addition, the operating room will be shut