THEM: ok you would like a hat and two balls, am i right?  YOU: i need three hats and the book please  THEM: not going to happen  YOU: what would you like?  THEM: book, two hats and one ball  YOU: i need the hats. if i can have two hats and the book you can have the rest  THEM: how about you take all hats and i keep the re'st  YOU: okay deal.