The fixed costs to produce x units of an item each month are $480. It costs $10 to produce each item. Each item sells for $50. a.The cost function, C(x) = Type your answer here x+ Type your answer here b. The revenue function, R(x) = Type your answer here c. The profit function, P(x) Type your answer here X- Type your answer here d. The company must sell more than Type your answer here units each month to make money.