I was using his spreadsheet, here, and followed his links:
https://docs.google.com/spreadsheets...gid=1712918261
Honestly I didn't take much time to change the values as I'm busy currently, so I'm not going to vouch for my numbers as being 100%, but on quick check I couldn't see how he came up with his, as his original data that he used to write the article doesn't appear to be there anymore.