Another alum here! Other things to consider:
- Clothes/shoes (may be required for initiation/rituals, events, formals), as well as hair and/or makeup
- Conferences/retreats above the local level (registration, transportation, hotel, meals)
- Mandatory training/certification for those seeking leadership positions in the sorority (e.g., background check)
Will add more of these as I think of them. Sorority membership is absolutely a luxury ...