I rent planes “wet”. If I have to buy fuel on a longer flight then I just save the receipt and deduct that amount from the total rental cost. So the price I pay the club is: (wet rate * hobbs hours flown) - fuel bought
This is kind of an odd situation because I have no incentive to buy cheap fuel (and no monetary incentive to lean accurately other than maximizing my range between fuel stops)
I entered the airplanes wet rate in the “dry rate” field and I just put “0” in the fuel price field. It is somewhat annoying to have to enter “0” each time in order to continue with the flight planning. Perhaps make this default to 0. If defaulting to 0, then you could put a warning on the next screen “No fuel price entered, etc…” if the user submitted the form without entering a price.
Anyway I’m not sure who the majority of users of the flight planning are. It could be that people renting planes wet are in the minority and we’ll just have to live with minor inconvenience