My question involves labor and employment law for the state of: Pennsylvania

I work in advertising sales. It is my first year and I was given a 1 year contract offering mostly salary with some commission if my baseline sales requirements are met. I am approaching the end of my year of work an there is a rumor that the next contract I will be offered is going to be only commission and no salary which worries me about how I might pay my monthly bills. If I don't sign on the new and different contract they might ask me to sign, would I still qualify for unemployment benefits?
Thank you in advance for your help.