Ventaz Corp Manufactures Small Windows for Back Yard Sheds

Multiple Choice

Ventaz Corp manufactures small windows for back yard sheds. Historically, its demand has ranged from 30 to 50 windows per day with an average of 43. Alex is the one production worker and he works eight hours a day, five days a week. Each order is one window and each window takes 5 minutes.
What is the average waiting time in minutes?

A) 2.50
B) 4.06
C) 2.03
D) 21.50