Jillian Harmon supervises 5 cashiers at Jack's Market.In the past,each cashier served an average of 25 customers per hour.Two months ago,management remodeled the store and installed a new cash register system.Customers no longer need to take their groceries out of the basket.Last month the number of customers served was 5,185 and each cashier worked an average of 170 hours for the month.Based on this information,the service rate has

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Before the remodeling, each cashier served 25 customers per hour, which means a total of 125 customers per hour for all 5 cashiers. Assuming they worked at the same rate last month, when they served 5,185 customers, it means they worked for a total of 41.48 hours (5185/125). However, the actual number of hours worked by each cashier was 170, which means they served an average of 30.5 customers per hour (5185/5/170).

So the new system increased the service rate from 25 to 30.5 customers per hour, which is an increase of 22%.

Jillian Harmon Supervises 5 Cashiers at Jack's Market