hard decision

So i'v gotten 2 jobs. one at ace and one at sunshine. i started sunshine in jan. and ace in may. at ace iv worked there the 3rd longest besides the manager. by september ill be the longest. next to the manager of course! but at ace i could be getting 40 hours a week if i quit sunshine. but i don't feel like i should do it so early because my manager at sunshine pretty much fought for me to work there! im so confused on what to do. i could be a fucking 16 year old assistant manager!!! as in i would be getting paid that but wouldn't actually uphold the title. What would you do in this case. I'm thinking about quiting sunshine in maybe august.
i get paid $20 each hour 

