The context of the following conversation is Gas was very expensive in this town, but Casey bought gas anyways.:
Casey says The gas in this town always costs so much, but I had to fill up regardless..
The friend responds How it is so expensive?.
Casey responds No idea, but I always try and avoid using them if possible..
The friend responds Understandable, you don't want to be out of pocket that much..
Casey responds See, you understand!.
The friend responds Yeah, I do!.