A business sells items according to the following Cost and Revenue functions: C(x)=30x+8700Cx=30x+8700 R(x)=−1x2+390xRx=-1x2+390x   (a) Find the profit function: P(x)=Px=       (b) How many items should be sold to break even? (Round to the nearest whole number. Enter your answer as a comma-separated list if necessary) (Enter the smaller number first) x=x=      (c) What is the maximum profit for this business? (Round to two decimal places)

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