THEM: i'll give you 1 ball and a hat  YOU: so you get 4 items? no thanks ill take 2 hats and 2 balls then and throw in 2 books  THEM: nope, i'll give you 2 balls  YOU: no ill give you 2 books only  THEM: deal  YOU: you take 2 books i get the rest thats 2 hats and 2 balls.