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Hello Muhammad,
There is not very much that I can say here - are you certain you entered all of the input numbers as they appear in the Training Materials? Those numbers are quite close, so it sounds like there's only a small error somewhere.
Try viewing different kinds of results to track down where the difference originates from. For example, compare not the demand for each fuel in your model with that provided in the training guide on pg. 19, to see which one differs. Then look further to check that each demand has been correctly entered, for the fuel which disagrees with the online material.
In future, please be more descriptive with your questions - to give you a full answer, we need a full question. Have a look at our posting guidelines here:
http://www.energycommunity.org/default.asp?action=184
Best of luck,
Taylor