As some said, it would depend on the school and chapters. Why do I say this? It might be because that working in todays economics has to be done.
It is called paying your way to go to college and that is the most important thing isn't it?
But if your possible new sisters understand that then it will make it a bit easier. Now, if you can work out your schedual with your boss this early the more the better.
Then maybe things can be worked out later on, both buy yor GLO and your boss.
Either way, good luck!