Need Help with Bills ($88.90)!

Hello, first time posting here. I'm a college student living with roommates where we split the electric/gas bill (PG&E) and we've just learned that one of our roommates moved out without telling us and is trying to skip out on the bill! While we're trying to get him to pay his part, I still have to deal with the fact that the bill is now a heavier burden on me because I have other bills to pay in the coming week.

I'd like to ask for help with the difference in electrical bill ($33.90) and help with my internet bill that I need for a part-time job ($55). Thanks in advance!