The Work-in-Process inventory account of a manufacturing firm shows a balance of $3,890 at the end of an accounting period. The job cost sheets of two uncompleted jobs show charges of $540 and $340 for materials, and charges of $550 and $850 for direct labor. From this information, it appears that the company is using a predetermined overhead rate, as a percentage of direct labor costs, of Multiple Choice OB 0 278% 115% O 39%