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Supplemental Information Iowa Daily Commodity Prices October 2006 Date Gas Cost Component ($/Therm) 10/01/2006 $0.37005 10/02/2006 $0.37005 10/03/2006 $0.41448 10/04/2006 $0.41246 10/05/2006 $0.45032 10/06/2006 $0.47456 10/07/2006 $0.43366 10/08/2006 $0.43366 10/09/2006 $0.43366 10/10/2006 $0.51949 10/11/2006 $0.52908 10/12/2006 $0.59067 10/13/2006 $0.53160 10/14/2006 $0.45790 10/15/2006 $0.45790 10/16/2006 $0.45790 10/17/2006 $0.54372 10/18/2006 $0.65529 10/19/2006 $0.63914 10/20/2006 $0.70578 10/21/2006 $0.71890 10/22/2006 $0.71890 10/23/2006 $0.71890 10/24/2006 $0.77999 10/25/2006 $0.75878 10/26/2006 $0.76484 10/27/2006 $0.82845 10/28/2006 $0.76080 10/29/2006 $0.76080 10/30/2006 $0.76080 10/31/2006 $0.74818 For Your Home | For Your Business | Safety | Rates | Energy Efficiency | Economic Development | Environmental Efforts About Us | Careers | News Room | Storm Center | Wind Energy | Contact | Streetlight Repair Request | System Outage Watch | Energy Choice | For Contractors | For Landlords | ©2009 MidAmerican Energy Holdings Company. All rights reserved.