THEM: i will give you 2 hats and 1 ball  YOU: 3 hats and 1 ball?  THEM: no  YOU: so you won't negotiate at all?  THEM: okay, i'll take 3 hats and 1 book  YOU: 2 hats and 1 book?  THEM: how about i take 3 hats and you keep the rest?  YOU: fine.