A small cell phone company estimates that by charging xx dollars for each phone, they can sell 102−0.2x  phones per day.  The quadratic function R(x)=−0.2x2+102x  is used to find the revenue, R, received when the selling price of a phone is x dollars.  Find the selling price that will give the maximum revenue and then find the amount of the maximum revenue.    The selling price that will give maximum revenue is_______ The maximum revenue is_________

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