THEM: i need the hats and the books, you can have the ball  YOU: i need three hats.  THEM: i can give you 2 hats if i get 1 hat and everything else  YOU: 2 hats and a book for me  THEM: i have to have all the books, 1 hat and the ball if you take 2 hats  YOU: i need more than just two hats  THEM: i can't give you anything else  YOU: i guess we have no deal.  THEM: if you give me all the hats you can have the rest  YOU: i need 2 hats and one more item,.  THEM: then no deal.