Brandon is selling t-shirts at a discount for bulk purchases. He has fixed costs of $12,900 and variable cost per unit of $0.40x+113 dollars, where x is the total number of t-shirts produced. Suppose further that the selling price of its product is based on the discount given by $ 242 -0.6x dollars per unit. Give the functions for Revenue, Cost, and Profit: R(x) =? C(x) = ? P(x) = ?