THEM: i get 1 hat and 1 book you get all the balls  YOU: i get 3 hats and a ball?  THEM: i get 2 hat and 1 book and you get 2 hats and 1 ball  YOU: how about 3 hats and a ball?  THEM: no deal  YOU: 4 hats and no ball?  THEM: you get 4 hats and i get the rest  YOU: deal!