$($d$)$ Does paying for the computer$-$based system to reduce the variation in service time make economic sense? The firm's

director of operations rejected the request for the new system because the hourly cost is $$5$ higher and the mean

repair time is the same. Do you agree? How much $($in dollars$)$ will the new system save the company during a $40-$hour

work week? $($Round your answer to the nearest cent. Enter $0$ if there are no savings.$)$

The average savings over a $40-$hour work week amount to $

$.$ Based on this, the director's argument

should be