Puzzle Co. uses a job order costing system. The company's executives estimated that direct labor would be $1,500,000 (100,000 hours at $15/hour) and that estimated factory overhead would be $3,000,000 for the current period. At the end of the period, the records show that there had been 120,000 hours of direct labor and $2,800,000 of actual overhead costs. Using direct labor dollars as a base, what was the predetermined overhead rate?