cost for customers waiting during the repair process. (a) What are the arrival rate and service rate in jobs per hour? (Round your answers to four decimal places.) == (b) Show the operating characteristics. (Round your answers to four decimal places. Report time in hours.) LqLwqW====hh Show the total cost per hour. (Express the total cost per hour in dollars. Round your answer to the nearest cent.) TC=$ wqw==hh Show the total cost per hour. (Express the total cost per hour in dollars. Round your answer to the nearest cent.) TC=$ The average savings over a 40 -hour work week amount to $ . Based on this, the director's argument should be