Even 10 pounds/leg can add up.
10#/leg * 6 legs/day * 345 days/year (leaving 20 days of "down time" for mx) = 20,700# per plane.
If you have 10 planes, that's 200,000 # of gas or ~ 29,600 gallons.
At even $2.00/gallon, that's almost $60,000.
Not earth shattering, but hey....it adds up.
...and before someone wants to know what operator I got those numbers from, I didn't. I picked some. At random. I don't know (or care) how your operator operates xyz aircraft. I just picked a number for the discussion. M'kay?
-mini