Answer the Following Questions Using the Information Below

Multiple Choice

Answer the following questions using the information below:
Kay's Window Company has a variable demand. Historically, its demand has ranged from 20 to 40 windows per day with an average of 30. Kay Ballard works eight hours a day, five days a week. Each order is one window and each window takes 13 minutes.
-What is the average waiting time, in minutes?

A) 1.6
B) 4.4
C) 28.2
D) 56.3