Elan guides lvl 1 2014 errata

Just to tell people that there is an error in Elan guides, Book 5 page 92. LVL 1

ApproxCon = ( (PV-) **+ (**PV+) - (2PV0) ) / (change in yields)squared x (PV0)

This is the correct formula.

If anyone has other errors in the books, I’m interested.