THEM: i would like the balls and at least 1 book please  YOU: i really want at least one ball and one book  THEM: you can have all of the books if i get both balls  YOU: i need at least one of the balls  THEM: if i give you 1 ball then i would need all of the books  YOU: if i get both of the balls i can give up the books  THEM: if i get both balls you can have everything else  YOU: that's not good for me  THEM: my last offer i take 1 ball, 2 books and 1 hat  YOU: fine.