Schmoogle
u as the pilot give the LM the loadsheet info. so it is up to u as the pilot to provide them with the correct trip fuel figure so that exceeding MLW will not be a problem. ie if 5% is included into the trip fuel calculated by ur program then minus 5% from the trip fuel figure that u give to the LM.
So that if u dont burn it u will land at MLW and if u do burn it u will have more of a margin over it. Ie plan on the safe side.