The following information has been gathered for the GHI Manufacturing Company for its fiscal year ending December 31: Actual manufacturing overhead $ 168,100 Actual direct labor hours 46,900 Actual direct labor costs $ 314,500 Estimated manufacturing overhead costs $ 165,600 Estimated direct labor $ 303,500 Estimated direct labor hours 48,000 What is the predetermined manufacturing overhead rate, assuming direct labor cost is used as the activity base?