For the one on Sunday 24th June 2012
"All entries received at the Sporting Car Club before the closing date of 4:00pm on Wednesday the 6th June 2012 will pay an entry fee of $85.00 for SCC Club Members, or $105.00 for Non SCC Members. Please note all Entry Fees are GST inclusive."
Taken from an email I got the other day. They usually don't allow late entries so if you want to go you have to get the entry in before the cut off date.
Edit: And look at that, winter cup costs the same these days. Maybe they were finding if hard to fill the spots