THEM: i would like the book and balls and one hat.  YOU: i want just the book and ball you can have all 3 hats  THEM: i can't do that deal. how about i take the hats and the ball. you take the book.  YOU: if you take the ball i need 2 hats  THEM: what about the book?  YOU: book for me and 2 hats rest for you  THEM: i can do book for you and one hat. ball for me and two hats.  YOU: deal  THEM: sounds good! deal!