a firm is developing a new product an early

Question

A firm is developing a new product. An early introduction (beating rivals to market) would greatly enhance the company's revenues. However, the intensive development effort needed to expedite the introduction can be very expensive. Revenues and costs associated with the new product are given by:

                                                                                                 R = 720 - 12t

         and  

                                                                                                 C = 600 - 20t + 0.2t²

where t is the introduction date (in months from now). Some executives have argued for an expedited introduction date, 15 months from now (t = 15). Do you agree? What introduction date would you recommend?