Bid
A vehicle's offer.
Lower is better. That convention has to be stated somewhere and this is the place: a bid is a cost the vehicle is quoting, not a fitness it is claiming, so distance, completion time and remaining charge all point the same way without any policy having to negate anything.
The note is for the modeller, not for the mechanism -- nothing reads it. It exists so that a study comparing bidding rules can record why a vehicle offered what it did, which is otherwise lost the moment the auction closes.