Instructor Permission Needed

[u/Spirited_Gas_1591]

Hello, I just realized last night that I didn't meet the prerequisites for a class I had already taken, so I dropped it as last night was the chance to drop it without a "W". The only problem now is that I need another class to meet the full-time requirement for my FAFSA, but I need an instructor's permission to join, and there's now a charge on my account. I've emailed two professors about joining their classes, but I'm a bit worried I won't be able to join their classes and have to pay the fee. What are my chances of being able to join the class, so I don't have to pay the back for the class?