AndroidMarket - Upload app

If I upload an app that I've made in Android's marketplace for selling. How much does google/marketplace take in charge for every penny that I make, and I'm living in Sweden, I've heard they take a percent of the pennty too?

Please c开发者_如何转开发an someone explain this to me. Thanks!

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See Transaction Fees. Each time you sell your application, Google takes 30% of the application price.