Clue,
You will get paid on your last day of active duty service for the previous month served. In your case, since you are separating at the end of the month it makes things nice and tidy for your calculations.
I recently seperated on the 30th of August after taking the full 60 days of terminal (transition) leave. On the 31st of August I received my normal paycheck plus a nice bump of 17 days of unused leave I sold back at the going rate of Base Pay/30 per day of unused leave. I didn't wait to receive my leave rebate but rather got it lumped into my last paycheck.
Don't forget you are entitled to unemployment but the process takes a while to get going. You have to wait until your DD214 shows up in the mail anywhere from 2 weeks, in my case, to much longer depending on who you talk to. In the meantime, continue to file but expect to get denied until the ink signed copy is in your hands.
As every other person on this board advises, try to secure a reserve or guard job if that's an option for you.
Good luck