How would I answer problem 2?

2. Ganon Co. applies overhead based on machine hours. They have an applied overhead of $80,000 and actual overhead of $75,000 for the month of October. In October, the total number of direct labor hours was 2,000 and the total number of machine hours was 9,000. Overhead for the year was estimated to be $700,000. How many machine hours were estimated for the year? a. 84,000 b. 17,500 c. 18,667 d. 35,185 78,750