Next time there will be a charge for this info...with TV and Radio, here is why market size is important...the currency the ad agency buyer is looking to exchange is agency money for rating points. A rating point represents 1percent of the demo agency is targeting, demo meaning 18 to 49 year olds etc. In a large market like Houston, that percentage reps a very large number of potential viewers, as compared to Lafayette, it's just a few thousand. Agency will assign a cost per rating point to the desired rating...it's what the agency is willing to pay for that 1 percent....lots of research involved with this cpp calculation..in Houston, it could be $5000 a point...an estimated audience comes from the station or network side an sn estimate of the rating is agreed apon... Estimate comes in at a 2.5 rating x $5000 a point equals $12500 for a30 second ad...I'm Lafayette, that cpp is prob $50...or $125 for the 30...since these are estimates, when agency gets the #s for their buy(actuals) the agency will allow for a 10 percent variance in the number..our 2.5 comes in at a 2...the TV or radio outlet will bonus a schedule to agency to make up the half point...same here in Laffy. The difference takes place with that pool of money at the end of the season that is split as per contract with schools...$12500 vs $125...that's why large markets and TV matter...next time I'm charging Turbine for this info...