THEM: hi, i would like the hats, and 1 ball. in exchange you can have the books and 1 ball  YOU: i would really like the hats and one book  THEM: i can split the hats, giving you 1 but i need both of the balls in that case  YOU: i would need both hats and one book or both books and one hat  THEM: yes, you get both books and we split the hats. i get the balls  YOU: deal.