Which of the following mathematical equations is used to calculate a predetermined overhead rate? Oa. Predetermined Overhead Rate - Estimated Annual Manufacturing Cost /Estimated Quarterly Activity Level Ob. Predetermined Overhead Rate - Estimated Annual Overhead / Actual Annual Activity Level Oc. Predetermined Overhead Rate Actual Annual Overhead / Actual Annual Activity Level Od. Predetermined Overhead Rate Estimated Annual Overhead/ Estimated Annual Activity Level e. Predetermined Overhead Rate Actual Annual Cost of Goods Sold /Estimated Semi-annual Labor Hours John has applied overhead of $80,000 and actual overhead of $70,600 for the month of November. He applies overhead based on direct labor hours, and that amounts to 10,000 hours for the month of November. The overhead for the year was estimated to be $1,120,000. How many direct labor hours were estimated for the year? Da. 140,000 Ob. 500,000 Oc. 225,200 Od. 650,700 e. 150,000 Nexx