On Tue, Jan 5, 2010 at 8:29 AM, Joram Mwinamo
<joram.mwinamo@gmail.com> wrote:
Cant remember for sure but some study suggested something like 3B a month? In fuel and time....
I remember this study too. I bet as the cost of fuel fluctuates, so is the figure, because fuel consumption was a major factor.
The "time" part of the calculation should be almost constant if the factors that were considered aren't changing.