A company produces x units of commodity A and y units of commodity B each hour. The company can sell all of its units when commodity A sells for p=25−5x dollars per unit and commodity B sells for q=45−10y dollars per unit. The cost (in dollars) of producing these units is given by the joint-cost function C(x,y)=5xy+3. How much of commodity A and commodity B should be sold in order to maximize profit?

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