Your first example had demo as being a higher number.
Anyhow, I think you mean to multiply by 1.06 and 1.09 instead. Just change the .06 and .09 in the script to 1.06 and 1.09 and it should give you what you want.
[EDIT] Just one thing I'm confused about, though. It looks like you're displaying tax (6% and 9% tax). Yet the price you're getting includes tax already....
