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: Machining Assembly Direct labor hours 12,000 8,000 Direct labor cost $18,000 $10,000 Machine hours 1,000 Manufacturing overhead $15,000 $20,000 Based on the above information, what are the predetermined overhead rates for machining department and assembly department? 3,000 Select one: a. $6 and 200% b. $5 and 100% C. $5 and 50% d. $5 and 200%