Predetermined Factory Overhead Rate Poehling 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 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 Disposable supplies Depreciation expense Utilities Nurse salaries Technician wages Total operating room overhead $299,600 75,000 32,000 278,500 126,900 $812,000 The overhead costs, will be assigned to procedures, based on the number of surgical room hours. Poehling Medical Center expects to use the operating room an average of eight ha operating room will be shut down two weeks per year for general repairs. a. Determine the predetermined operating room overhead rate for the year. per hour b. Bill Harris had a five-hour procedure on January 22. How much operating room overhead would be charged to his procedure, using the rate determined in part (a)? c. During January, the operating room was used 240 hours. The actual overhead costs incurred for January were $67,250. Determine the overapplied operating overhead or undera