So I drove a friend down to a festival which was about a 5 hour drive and I spent $200 on petrol. On the way back home I took another friend. So one friend there and two friends back (one being the same friend I took down in the beginning).

Do I charge the friend that went both ways with me more than the other? Or charge them the same?

I also drove them into town which was about a 20 minute drive from where we were around twice a day for the two days so do I add that as an extra cost?

Also, how much should I charge? I have no idea

Thanks in advance!