Sigh! 
Ok here we go ...
............................................................................
It's the way you tell'em that gets the message across.
Right, try me then. He's priced it wrong, the customer does not want to pay the revised price after he's done the job? he dumps them, whats the lesson learned ?
I'm not sure why you'd want to girl thingy foot around these questions, they're plainly daft questions. By trying not offend the OP, or be unecessarily blunt with him how else do you tell him its his mistake and to ask should he dump someone who's paid him what he priced and agreed is a daft question? I'm typing what i'd say, you can look at ways to tell'em !!!!
