X Open spreadsheet a. Determine the predetermined operating room overhead rate for the year. Round your answer to the nearest dollar. per hour b. Bill Harris had a six-hour procedure on January 22. How much operating room overhead would be charged to his procedure, using the rate determined in part (a)? Round your answer to the nearest dollar. c. During January, the operating room was used 200 hours. The actual overhead costs incurred for January were $46,400. Determine the overapplied operating overhead or underapplied operating overhead for the period. Enter your answer as a positive number. Round your answer to the nearest dollar.