THEM: i need the books and the hat and you can have the balls  YOU: that doesn't work for me. how about you get the books and one ball?  THEM: i would need the books and all the balls  YOU: that would only leave me with one hat. not fair. how about you get two balls, and one book?  THEM: i have to either have the hat and the balls, or the books and the hat, or the books and the balls  YOU: how about the books and the hat?  THEM: that would work, you get the balls  YOU: perfect! deal!