Nick Lappos is the one to ask.
But how much are you expecting to burn on taxy??
For an A380 that has to taxy a couple of miles to reach the runway threshold, it is a reasonable figure.
But a 76 is unlikely to taxy for more than a couple of minutes - your brakes will get rather hot and require 10 mins flight with the wheels down.
If your fuel/pax load is THAT critical, leave one person behind or refuel along the way.