The Following Information Relates to Cranmore Manufacturing: to Produce a Unit

Multiple Choice

The following information relates to Cranmore Manufacturing: To produce a unit of product: Cutting department $\quad 5$ minutes per unit
Wel ding department $\quad 8$ minutes per unit
Polishing department $\quad 3$ minutes per unit
Finishing department $\quad 4$ minutes per unit There is a wait time of 5 minutes before the cutting department begins a batch, 15 minutes between the cutting and welding departments, a move and pre-wait between welding and polishing of 12 minutes, and a move and pre-wait between the polishing and finishing departments of 8 minutes.
What is the production rate?

A) 12 units per hour
B) 20 units per hour
C) 15 units per hour
D) 7.5 units per hour