If you know prices have not increased since 2004 then I would add some AMMO to your notice.
Mention Gas prices in 2004 verus today and how that is a significant part of the operating expense. Mention the CPI increase from 2004 to 2012.
Oct 2012 CPI 231.3
Jan 2004 CPI 185.2
Diff = 46.1 / 185.2 = 24.9%