SOMEONE PLEASE HELP ME I DONT UNDERSTAND !!!!
 For a certain company, the cost for producing x items is 55x+300 and the revenue for selling
 items is 95x- 0.5x^2
 The profit that the company makes is how much it takes in (revenue) minus how much it spends (cost).
 In economic models, one typically assumes that a company wants to maximize its profit, or at least
 wants to make a profit!
 Part a: Set up an expression for the profit from producing and selling x items. We assume that the
 company sells all of the items that it produces. (Hint: it is a quadratic polynomial.)
 Part b: Find two values of a that will create a profit of $300.