A manufacturer sells video games with the following cost are revenue functions (in dollars), where x is the number of games sold. Determine the interval(s) on which the profit function is increasing. C(x) = 0.15x^2 - 0.00002x^3 R(x) = 1.014x^2 - 0.0002x^3 Select the correct choice below and fill in any answer boxes within your choice. The profit function is increasing on the interval(s). (Type your answer in interval notation. Use a comma to separate answers as needed.) The profit function is never increasing