The answer is 854 for sure. I did the test and got it all right.
The probability of not landing on blue is 2/3rds.
To answer this, you multiple 1000 by 7,234 because each box comes with 1000, so if there are 7234 boxes, then you multiple the stirrers by the # of boxes
This might be wrong but I got .024806509
I don't know if you wanted it rounded but I hope this might have helped.