Verizox Company uses a job order cost system with manufacturing overhead applied to products based on direct labor hours. At the beginning of the most recent year, the company estimated its manufacturing overhead cost at $167,400. Estimated direct labor cost was $421,200 for 18,000 hours. Actual costs for the most recent month are summarized here: Total Cost $42,121 Item Description Direct labor (1,800 hours) Indirect costs Indirect labor Indirect materials Factory rent Factory supervision Factory depreciation Factory janitorial work Factory insurance General and administrative salaries Selling expenses 2,440 3,370 3,370 4,830 5,800 1,230 1,860 4,260 5,470 Required: 1. Calculate the predetermined overhead rate. 2. Calculate the amount of applied manufacturing overhead. 3. Calculate actual manufacturing overhead costs. 4. Compute over- or underapplied overhead