The revenue is the total selling price which is given by, R = (number of units) (selling price per unit) 5 = x| 1556 -x 9 5 =1556x- Calculate the derivative of R by differentiating it with respect to x. d (R) dx d 1556x- dx 5 10 =1556 -x 9 dR The revenue is maximized. Put 0. dx 10 1556-x = 0 9 10 x = 1556 9 1556x9 X = 10 =1400.4

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