THEM: i'll take the book and 2 balls. you can have the hats and 1 ball.  YOU: cna i have the book and 1 ball? you can have the rest.  THEM: no i have to have the book and at least one of the other items.  YOU: the book has high value for me. so i'll take the book & you can have the rest.  THEM: okay we can do that.  YOU: ok books for me & the rest for you. thank you.