You're welcome. It's not actually something I've got personal experience of using but several of the reports our company run use them. I'm waiting for a chance to try it out myself!
On two occasions I have been asked, "Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?" ... I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.
—Charles Babbage, Passages from the Life of a Philosopher
How to post a question to get the most help http://www.sqlservercentral.com/articles/Best+Practices/61537