Sheridan Company uses a job order cost system and applies overhead to production on the basis of direct labor costs. On January 1, 2022, Job 50 was the only job in process. The costs incurred prior to January 1 on this job were as follows: direct materials $18,400, direct labor $11,040, and manufacturing overhead $14,720. As of January 1, Job 49 had been completed at a cost of $82,800 and was part of finished goods inventory. There was a $13,800 balance in the Raw Materials Inventory account on January 1. During the month of January, Sheridan Company began production on Jobs 51 and 52, and completed Jobs 50 and 51. Jobs 49 and 50 were sold on account during the month for $112,240 and $145,360, respectively. The following additional events occurred during the month. 1. Purchased additional raw materials of $82,800 on account. 2. Incurred factory labor costs of $64,400. 3. Incurred manufacturing overhead costs as follows: depreciation expense on equipment $11,040; and various other manufacturing overhead costs on account $14,720. 4. Assigned direct materials and direct labor to jobs as follows. Job No. Direct Materials Direct Labor 50 $9,200 $4,600 51 35,880 23,000 52 27,600 18,400 5. Assigned indirect materials of $15,640 and indirect labor of $18,400. (a) Calculate the predetermined overhead rate for 2022, assuming Sheridan Company estimates total manufacturing overhead costs of $772,800, direct labor costs of $644,000, and direct labor hours of 18,400 for the year. Predetermined overhead rate %