How do I get a travel permit while I am a permanent resident of the usa?

Question

and around how much is it if a fee is involved?

Answer 1

You don't need a travel permit if you have your green card. You need a re-entry permit if you are going to be out of the US for more than 1 year, but otherwise you're fine for short trips. You just show your green card and foreign passport when you re-enter the US.