The context of the following conversation is Casey was 75% full in the tank, but Casey bought gas anyway.:
Casey says I bought gas earlier today..
The friend responds Wasn't it 75% full though?.
Casey responds Yes, but we are going on a long road trip..
The friend responds I guess, but couldn't you buy more down the road?.
Casey responds I don't want to stop, and anyway it's cheaper here..
The friend responds I guess that makes sense..