DEF barber shop is a small one with only one barber. On average, one customer comes in every 20 minutes and it takes the barber an average of 15 minutes to serve the customer. Both interarrival and activity time are exponentially distributed. The barber estimates that each minute a customer is kept waiting costs him $1 in customer dissatisfaction and loss of future business.

What is total hourly customer waiting cost?

Answer rating: 100% (QA)

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