________ is an invitation to participate in a tendering system

Generally, the employment of staff specialists is justified only when:

A. The organization has a large turnover B. Such staff can be used to improve employee morale and working conditions C. Line managers are unable to collect any useful data D. The sales organization is large enough to provide staff specialists with enough work to keep them busy

A crew of mechanics at the Highway Department Garage repair vehicles that break down at an average of ? = 8 vehicles per day (approximately Poisson in nature)

The mechanic crew can service an average of ? = 11 vehicles per day with a repair time distribution that approximates an exponential distribution. The crew cost is approximately $300 per day. The cost associated with lost productivity from the breakdown is estimated at $150 per vehicle per day (or any fraction thereof). What is the expected cost of this system?