Registration Payment › SiS Registration 2025 - Ages 13+ (Supporter) Image 1 of 1 SiS Registration 2025 - Ages 13+ (Supporter) $325.00 This is the at cost price for the weekend plus a little extra to help out other folks. Quantity: Add To Cart Added! This is the at cost price for the weekend plus a little extra to help out other folks. Credit Card Processing Fee (SiS 2025) $10.00 Add To Cart