The tool crib at a large manufacturing company is responsible for providing tools to the factory workers on demand. The tool crib has a variable demand. Historically, its demand has ranged from 150 to 250 small tools per day with an average of 200. Diane, the tool crib attendant, works eight hours a day, five days a week. Each order is for one small tool and each small tool takes Diane 2 minutes to retrieve from the bins. What is the average waiting time, in minutes?