The good news is Jet-A is only $5.20 at Clark, but $5.79 at KBBG.
I assume you're just kidding of course....airlines don't purchase fuel retail, they have their own and just pay the upload fees. Southwest especially was good at keeping fuel costs down by hedging fuel.
I truly don't know where the portable stairs came from, but I know in a situation without a fire or other emergency situation, you simply would have to wait for stairs.
Emergency evacuations are potentially hazardous so they had the stairs driven over from where they intended to land. It was in an earlier report posted on this thread.