Austin Company uses a job order cost accounting system. The company's executives estimated that direct labor would be $4,160,000 (260,000 hours at $16/hour) and that factory overhead would be $1,560,000 for the current period. At the end of the period, the records show that there had been 240,000 hours of direct labor and $1,260,000 of actual overhead costs. Using direct labor hours as a base, what was the predetermined overhead allocation rate?