You won the​ lottery!! You decide to first buy the expensive car​ you've always loved. There are lots of options. In addition to deciding whether you want an automatic or manual​ transmission, you have to choose an exterior color from 15​ options, an interior color from 12​ options, seats that have either a heating or massage​ option, 4 different types of audio​ systems, and 5 luxury packages with special extras for your car. If you pick one in each​ category, how many different car packages are​ there?