The manager of a large group of employees must decideif she needs another copying machine. The cost of a machine is$375 per 8-hour day whether or not the machine is in use. Anaverage of 16 people per hour need to use the copying machine. Each person uses the copier for an average of 3 minutes. The employee cost is $35 per hour, and we assume that a waiting cost is incurred when a worker is waiting in line. How many copying machines should be rented to minimize cost?