THEM: both hats, you get the rest  YOU: i can do that if you include one book.  THEM: so 2 hats and a book for me?  YOU: sorry, meant exchange a book for a hat in your initial offer.  THEM: hats i like alot, they fit perfect  YOU: i bet they look good on you, but my head is cold and needs a hat.  THEM: ok, how about 1 hat a piece, but i get 2 books and the ball  YOU: let's split the hats, and then you can have any two books you want and i keep my ball.  THEM: deal  YOU: ok.