THEM: ok you take all hats and i keep the rest  YOU: i'd like a book along with the hats  THEM: one ball  YOU: what do i get along with the ball?  THEM: hats and one ball for you  YOU: i'd prefer the hats and one book, or i'll take 2 hats and both books  THEM: i can't do that,  YOU: okay send me your final offer.  THEM: i need books and you keep the rest  YOU: done.