I need to build a worksheet that calculates MPG for a car whenever the tank
is filled. The tank is not filled each time, but some times only a few
gallons are put in.
I need a formula that will do the maths only when the tank is filled. It
would need to take into account the partial fillings in order to get the
correct MPG.
Any help would be greatly appreciated.
Cheers,
Rusty
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