The HY manufacturing company computes predetermined overhead rate on the basis of machine hours in the machining department and direct labor cost in the assembly department. The following estimates were made at the beginning of the year: Direct labor hours Direct labor cost Machine hours Manufacturing overhead Machining Assembl 12.000 8.00 $18.000 $10.00 3,000 1.00 $15.000 $20.00 Based on the above information, what are the predetermined overhead rates for machining department and assembly department? Select one: a. $6 and 200% b. $5 and 50% c. $5 and 100%