A manufacturing company applies factory overhead based on direct labor hours. At the beginning of the year, it estimated that factory overhead costs would be $358,800 and direct labor hours would be 47,200. Actual manufacturing overhead costs incurred were $306,800, and actual direct labor hours were 55,000. What is the predetermined overhead rate per direct labor hour?

a.$7.60

b.$6.08

c.$11.40

d.$9.12