THEM: i need the ball and the hat  YOU: i'll give you two balls and one hat.  THEM: you mean 2 books?  YOU: two books and one hat.  THEM: i need the ball  YOU: no ball. i'll give you everything else /  THEM: how about i take the ball and you get everything else?  YOU: nope.  THEM: ok you take the ball i will have everything else  YOU: deal.