1. The problem statement, all variables and given/known data Find the level of production x that will maximize profit. 2. Relevant equations C(x) = 500 + 100x^2 + x^3, where x = units produced. R(x) = 7000x - 80x^2 3. The attempt at a solution Should I use marginal cost and marginal revenue, or is there a way to just use the equations directly to find the profit maximization?