Most Althoff kids get assistance, if the way things used to work are still in place.
Althoff was fed by seven neighborhood parish schools - once one parish (going west to east along Main Street) hit 1000 families, another was formed. Those kids went to the parish school, then to Althoff. (From east to west: Blessed Sacrament, Saint Henry, Queen of Peace, Saint Augustine, Saint Mary, Cathefral, St. Clare.) There were kids that came from Saint Phillips, Saint Edward and Sister Theodora in ESL who cake to Althoff too.)
I went to Queen of Peace from 1979 until 1987. I think 8th grade cost $350 - with the caveat of Sunday giving, plus $10 per athletic team I joined - so another $30.
QP kids who went to to Althoff, whose parents gave the nominal weekly offering, were underwritten a significant portion of tuition by the parish. The idea was to fund the parish, support education k-12 and leave enough for the next generation. I believe this continues to this day.
In 1991, when I graduated Althoff, tuition was about $1300 a year - parochial school graduate price, underwritten by my parish donations. If you did not graduate from one of those schools or did not make an offering to a feeder parish, you paid significantly more.