Question: A chain retail store is trying to decide the optimal number of check-out counters to staff during weekends. The store uses a multi-server system. It

A chain retail store is trying to decide the optimal number of check-out counters to staff during weekends. The store uses a multi-server system. It is observed that on average 200 customers will arrive per hour, and it takes 5 mins to serve one customer. Your goal is to minimize the total cost of service. The average hourly cost of waiting for each customer is estimated to be $100/hour, and the staff hourly wage is $15/hour. How many check-out counters should be staffed if the goal is to minimize the total cost of service?

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