I went to catholic school, most of the students’ families had at least tuition money. I was one of the “need-based scholarship” kids so my tuition was less, and I had a job so I had some income, which I used mostly for gas to get to and from my job and most of the rest went to tuition. Fines were added to the tuition bill, and if you hadn’t settled up by the beginning of the next year / graduation, you couldn’t re-enroll / graduate.