THEM: i need the books and 1 hat  YOU: you can have the books, but i need both hats and the ball  THEM: no i need a hat  YOU: sorry, i can't give up any hats.  THEM: well then no deal  YOU: no problem. no deal.  THEM: 2 books and 1 hat  YOU: still no deal. i need both hats.  THEM: ok no deal  YOU: ok.