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Part 1 of 2- Part 1 40.0 Points
This part of the question is based on the following information.
The Schmedley Discount Department Store has approximately 300 customers shopping in its store between 9 A. M. and 5 P. M. on Saturdays. In deciding how many cash registers to keep open each Saturday, Schmedley’ s manager considers two factors: customer waiting time( and the associated waiting cost) and the service costs of employing additional checkout clerks. Checkout clerks are paid an average of $ 8 per hour. When only one is on duty, the waiting time per customer is about 10 minutes( or hour); when two clerks are on duty, the average checkout time is 6 minutes per person; 4 minutes when three clerks are working; and 3 minutes when four clerks are on duty.
Schmedley’ s management has conducted customer satisfaction surveys and has been able to estimate that the store suffers approximately $ 10 in lost sales and goodwill for every hour of customer time spent waiting in checkout lines.
1. The total customer waiting time is __ hours when there is only one clerk, and it will be reduced to only __ hours if there are four clerks.( Please only enter an integer and include no units.)