The following information has been gathered for the GHI Manufacturing Company for its fiscal year ending December 31: Actual manufacturing overhead costs $212,500 Actual direct labor hours . 54,900 Actual direct labor costs .. $445,000 Estimated manufacturing overhead costs .. $210,000 Estimated direct labor . $434,000 Estimated direct labor hours . 56,000 What is the predetermined manufacturing overhead rate assuming direct labor cost is used as the activity base? a. 48.4% b. 47.2% c. 49.0% d. 47.8%