4. Paul Scott has a 2008 Cadillac that he wants to update with a GPS system so that he will have access to up-to- date road maps and directions. Aftermarket equipment can be fitted for a flat fee of $500, and the service provider requires monthly charges of $20. In his line of work as a traveling salesperson, he estimates that this device can save him time and money, about $35 per month (as the price of gas keeps increasing). He plans to keep the car for another 3 years. (a) Calculate the breakeven point for the device in months (b) Based on (a), should Paul have the GPS system installed in his car? 5. Millard's Entern