You can put a verb on the end of “C’est combien pour…?” to ask how much it is to do something. Literally, it means, “How much is it for…?”
C’est combien pour aller à l’aéroport? – How much is it to go to the airport?
C’est combien pour louer cette voiture? – How much is it to hire that car?
C’est combien pour envoyer ce colis? – How much is it to send this parcel?