I have 45 minutes to answer this, please answer quickly! Thanks

A store has been selling a popular video game at the price of $40 per unit. At this price, players have been buying 50 units per month. The owner of the store wishes to increase the price of the game and estimates that for each $1 increase in price, three fewer units will be sold. Each unit costs the store $25. Let x represent the number of $1 increases in the price of the game. a. Write a formula for the number of games sold if the price of the game increases by x dollars. b. Find the cost function, C(x) c. Find the revenue function, R(x) d. Find the profit function, P(x) e. At what price should the game be sold to maximize profit. Round your answer to the nearest cents