THEM: hi, i want the ball and i want 2 hats.  YOU: you can have the ball and one hat  THEM: i can do the ball and the book instead if you need 3 hats  YOU: no, that doesn't help  THEM: do you need the book?  YOU: yes  THEM: i don't need the book. i would like 2 hats though  YOU: no del  THEM: ok i will take the ball and 1 hat.  YOU: deal.