How much does it cost to join a UT spirit organization?

I want to get involved at UT but I think sororities are probably too expensive. How do the spirit organizations, such as Texas Spirits, and Texas Darlins compare in price to joining a sorority?

https://orgsync.com/8381/events/323842/occurrences/275798

Old link from 2012. Looks like $225 a semester back then for “babies” which I assume is like a pledge.