THEM: i'd like both hats and 2 books please?  YOU: i would like that but i can't, i need all books and one hat and one ball  THEM: that doesn't work for me. i need both hats and at least 1 book.  YOU: ok both hats and one ball  THEM: confirming that i'm taking 2 hats and 1 book not the ball?  YOU: yes.