I walked right up to the jar of jelly beans - I picked it up and looked through the base - I turned it into a matrix of sorts.
Quick estimates ---> ~15 per level, ~20 levels. Obviously they weren't neatly divided into levels but that was the abstract thinking I used.
That's 300 but I couldn't say that - I'm an artist.
303.
I said it out loud. "Well. It obviously contains 303 jelly beans."
There was a woman standing right there and she indicated in a friendly way she thought that was way too high. That was in keeping with all the scuttlebutt I was hearing. I had the highest guess that I heard. I believe the woman who openly second-guessed me had 186. Something like that.
Believe in yourselves, people.