I do the same thing when I'm bored. A few weeks ago, I was so bored so I decided to work out the percentage of time I'll be at school, sleeping and doing homework for that week.
Believe those are 20's actually. I can't really make out the actual bills, but it could be the older 20's that still had the oval around Jackson still. The straps are purple though, which means it should be $2000 in $20 bills. Which would mean if your calculations were correct it'd actually be a little over $1 million.
(I was bored and curious so I did some calculations)