The following information relates to Lancashire Manufacturing:

To produce a unit of product:

Mixing department 3 minutes per unit

Molding department 5 minutes per unit

Casting department 7 minutes per unit

Finishing department 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 would it take to process the first unit of a 20-unit batch under a cellular manufacturing setup?

a. 21 minutes

b. 12 minutes

c. 19 minutes

d. 60 minutes