During sales hour in a supermarket, Cynthia measures her urgency from buying x bags of candies and y bars of chocolate using the following function: f (x, y) = vxy (square root of xy). If Cynthia has USD 500 to spend and each bag of candies and each bar of chocolate cost USD 15.0 and USD 10.0, resp., how many bags of candies and bars of chocolate should she purchase to maximize her urgency? Note: Fractional number of bags and bars can be purchased.

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