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 7 minutes. Alex plans to add doors to its product line and anticipates that they will average 2 doors per day. Each door takes V4 minutes to install.
What is the average waiting time, in minutes, if Alex continues to be the only worker?

A) 220 minutes
B) 289 minutes
C) 241 minutes
D) 963 minutes