Yep and Helena is no better.  Dad normally writes the checks and more often than not he calls our salesman and asks him to tell him what he owes.  Prepay makes it even worse.  If there were one block that told you exactly what you need to write a check for the rest would be OK.  It's so complicated that you'd have to be doing it on purpose to mess it up that bad.  I've always assumed it was purposeful, but to what end I'm clueless.