I am currently averaging 7.14 per box but I had some skewed numbers.
I did get a $100 from a bank that was factory rolled with 16 - 40's in it.
I got two rolls that were customer rolls, one had 7 in it and another 14, got 23 total from that batch of customer rolls. Those were most likely flukes and I dont expect to see action like that again anytime soon though I wont be complaining if I do.