Jillian Harmon Supervises 5 Cashiers at Jack's Market

Multiple Choice

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

A) increased 19 percent.
B) decreased 21 percent.
C) increased 22 percent.
D) decreased 20 percent.