'Given a Team instance, return a Decimal.'

def get_due(self, team):

    return self.db.one(u'\n                                                SELECT    due\n                                                        FROM    current_payment_instructions\n                                                    WHERE    participant_id    =    %s\n                                                            AND    team_id    =    %s\n\n                                ', (self.id, team.id))
