THEM: ok what do you want  YOU: books and balls  THEM: i need ball and hats you get books  YOU: 1 ball and one book for me  THEM: i need the ball  YOU: ok, so two hats and two books for me  THEM: two hats and and one book for you  YOU: two books and two hats  THEM: yeah how about two books only  YOU: no deal.