A movie theater is offering a special summer pass. Pass holders pay $8 per movie for the first 5 movies and watch additional movies for free, up to a maximum of 15 movies. The function gives the total...

A movie theater is offering a special summer pass. Pass holders pay $8 per movie for the first 5 movies and watch additional movies for free, up to a maximum of 15 movies. The function gives the total cost, C in dollars, for a pass holder to watch N movies