Suppose that the contractor has a job that will take say 80 hours to
complete. For the sake of argument let's say that this contractor limits
his workdays to 8 hours. Now suppose that by driving 85mph rather than 55,
over a week or so he is able to spend enough extra work hours on the
customer's job so that it will be done in 9 days instead of 10. Now he's
eliminated a trip altogether, saving fuel cost and time that will likely
more than pay for the reduced fuel mileage of driving at 85mph.



--
There is always an easy solution to every human problem -- neat,
plausible, and wrong." (H L Mencken)

Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar. org