THEM: i'd like balls and 1 book.  YOU: no, no - best is 2 books 1 ball for me  THEM: no deal. hats are worthless to me. i can do 1 ball and 2 books for me.  YOU: looks like we need the same ; let's do 1 of each  THEM: what are hats for you?  YOU: 1  THEM: then you take 2 hats, 1 book and a ball.  YOU: agreed.