another of the array of words that is used loosely in a number of different ways concerning charging, eg “I bill at £x per hour”, “my bills total £y” or more technically  “this is an interim bill” (the right is reserved to re-charge the work at a different rate should circumstances dictate); “this is a final bill” (it may not be the last bill but the amounts for that period will not be altered later). FLiP’s bills are all “final bills”.