1. Actual Update For June 15, 2009 Posting Formula Rate Customer Meeting June 23, 2009

2. ProtocolsDefinitions • “Rate Year” • is defined as January 1 through December 31 • “True-Up” • is completed on or before June 15 each calendar year. • based on historical (actual) data (primarily Form 1 data from previous year) • “Annual Update” • recalculates the ATRR and Formula Rate for new Rate Year • uses historical data collected during “True-Up” Phase • adds in the projected data • is calculated and posted on or before October 15 each calendar year.

3. ProtocolsTimeline ********************************************************************************************* • “Rate Year”: January 1 – December 31, 2010 ********************************************************************************************* • “True Up” Update: June 15, 2009 • “True Up” Customer Meeting: June 23, 2009 • This date is kick off for Review Period • “True Up” Information Requests Period – 75 days: August 31, 2009 • Issues - Westar Energy Response Date: • Good faith effort to respond within 10 business days from date of information request. • Additional periods for data review resolutions, per Protocols posted on WR OASIS ********************************************************************************************** • “Annual Update”: October 15, 2009 • “Annual Update” Customer Meeting: October 22, 2009 • Potential Repost of Annual Update: November 30, 2009 **********************************************************************************************

4. ProtocolsOASIS Postings / Data Requests • OASIS Posting Requirements: • Updated Calculation • Protocols • Accounting Manual and changes • Data Request Submission Address • Submission of Data Requests to: Sheila Gropp Westar Energy 818 Kansas Avenue Topeka, KS 66612 Sheila.A.Gropp@WestarEnergy.com • Please provide all Data Requests in writing via email or letter.

5. Key Data Locations FERC Form 1 Data - 2008: FERC.gov (Westar Energy Form 1) Formula Rate Postings: Westar Energy Oasis http://sppoasis.spp.org/OASIS/WR or http://oatioasis.com Accounting Data User ID: AFSReader Accounting Data Password: AFSReader#1 Southwest Power Pool Oasis http://sppoasis.spp.org/OASIS/SWPP or http://oatioasis.com

6. Formula Inputs Sheila Gropp

7. Formula InputsIndex of Template Pages

8. Formula Components - 2008Annual Update • Data Included • Historical 2008 financial data Westar Energy Form 1 Kansas Gas & Electric Form 1 • FERC Approved Incentive Plant – Actual • SPP Projects - Actual • Template References: • Template Form 1 Reference format: Page, Line, Column • Worksheet Reference format: Worksheet P-1 (with section if applicable) • Yellow areas are change areas

9. References and Clarifications 1 Entered as + due to line 20 formula Actual Gross Revenue Requirements References and Clarifications: If you see any references that are not correct or if you have any suggestion, please let me know.

10. References and Clarifications 2 Base Plan Funded Projects Actual Gross Plant is the accumulation of plant placed in-service through the end of 2008. $7,483,253 includes plant in-service from 2006-2008. Accm. Deprec. is the total accumulated depreciation on these plant additions based on in-service dates. A-9 – Actual BPF Plant

11. References and Clarifications 3 Incentive Projects Actual Incentive Projects Projected P-1 – Projected Trans Plant Incentive Section A-11 – Incentive Plant

12. Wrap Up

13. Thank You!