include someone in (something)
to invite someone to participate in something. Let's include Terri in the planning session. Without asking, Henry included himself in the group going on a picnic.
include someone or something among something
to count someone or something as a member of a group or collection. I am happy to include you among my friends. Do you include chocolate among your favorite flavors?
include someone out (of something)
Fig. to exclude someone from something. (Jocular.) I am not interested in your games. Include me out of them. Include me out too.
throw something into the bargain
and include something in the bargain; throw something into include something extra in a deal. To encourage me to buy a new car, the car dealer threw a free radio into the bargain. If you purchase three pounds of chocolates, I'll throw one pound of salted nuts into the bargain. She threw in a free calendar.