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

The following information relates to Lancashire Manufacturing: To produce a unit of product: Mixing dep artment $\quad 3$ minutes per unit
Mol ding department $\quad 5$ minutes per unit
Casting department $\quad 7$ minutes per unit
Finishing department $\quad 4$ minutes per unit There is a wait time of 8 minutes before the mixing department begins a batch, 5 minutes between the mixing and molding departments, a move and pre-wait between molding and casting of 10 minutes, and a move and pre-wait between the casting and finishing departments of 12 minutes.
How long does it take to produce a batch of 20 units under a traditional manufacturing approach?

A) 380 minutes
B) 415 minutes
C) 35 minutes
D) none of the above