That's amost $30,000 at street value level. That's a lot of friggin' coke for an 18 year old to have. Way more than personal use. It is a very serious conviction he's facing.
Depending on the case expect to serve some jail time. But that's not really the issue here. What the issue here is the fact he's 18 and has coke. He needs to readjust his lifestyle, because now he's gonna have a hell of a time trying to find meaningful employment, even possibly attending certain schools.