Fixed Ratio Position Sizing - need help

The following link is an article about fixed ratio position sizing developed by Ryan Jones:

http://www.stator-afm.com/fixed-rati...on-sizing.html

I attempted to replicate the table into an excel spreadsheet. I'm close, but not quite there yet.

The problem is with the formula in the column "Contr#":
=0.5*((1 + 8 * P/delta)^0.5 + 1)

I added a column "Total P/LContr", which is what "P" in the formula is calculated from, and I added a column "BBF".

However, the # of contracts from the attached spreadsheet does not match the number of contracts from the attached link.

Also, the # of contracts times the PL/Contr does not calculate correctly either.

Any help appreciated.