need help with the step and answer

For a certain company, the cost for producing a items is 60x + 300 and the revenue for selling T items is 100r -0.5x2 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 a 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 $50. The field below accepts a list of numbers or formulas separated by semicolons (e.g. 2; 4; 6 or x +1; x -1), The order of the list does not matter, To enter va, type sqrt(a)