Murphy's Bombing Run

Help Murphy make Ultrajet is a minor quest in Fallout 3.

Murphy is a ghoul scientist stationed just inside Northwest Seneca Station. He has an assistant named Barrett, who acts mostly as a bodyguard. Murphy is working on an improved version of the drug Jet, known as Ultrajet. However, he needs your help with one of the ingredients: Sugar Bombs. For every box of sugar bombs that you bring him, he will pay you a decent amount of caps. You can then purchase Ultrajet from him as you turn in Sugar Bombs. It seems you can purchase 1 Ultrajet from him (around 70 caps each) for every 10 boxes of Sugar Bombs you turn in.

When you first talk to him and discover he is making Ultrajet, he offers you 15 caps per box of Sugar Bombs that you bring him. You can convince him to pay 30 caps per box by passing a Speech check.