Predetermined Factory Overhead Hot Poehling Medical Center has a single operating room that is used by local physicians to perform wurgical procedures. The cost of using the operating room is led by each patient procedures and indoor the direct materials costs (drugs and medical devices), physician surgical time, and operating room overhead on January 1 of the current year, the annual room overheads stated to the Disposable wupplies 1230,600 Depreciation experte 41,600 Utilities 24,200 Nurse salaries 346,200 Technician wages 113,400 Total operating room overhead $756,000 The overhead costs will be assigned to procedures, based on the number of surgical room hours. Pothing Medical Center expects to use the operating room an average of eight hours per day, seven days per week. In addition, the 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 4-hour procedure on January 22. How much operating room overhead would be charged to his procedure, using the determined in part (a)? c. During January, the operating room was used 18 hours. The actual overhead costs incurred for January were 549.100. Determine the everplied operating overed or underoled operating over for the period