An entrepreneur is considering opening a shop to sell kites. She estimates the cost of making x kites to be C(x) = 100 + 15x and plans to sell kites for $35 each. Which of the following statements is/are true? (I) The sales revenue is given by R(x) = 35x. (II) C(10) = 350 (III) For $400, she can produce 20 kites. (IV) If she sells 4 kites, her profit will be $140. (I) and (II) (I) and (III) (II) and (III) (II) and (IV)