Catman & Jecui,
the medical cost me $308.00 + any vaccinations you need.
the security check was exactly what you said, $172.03, but it gets rounded up to .05c, as well, the post office charged me a fee for them writing on a cheque for me.
Some of the people who were at the same stage as me (medical & security) have already been offered places, but my medical was delayed so i'm still waiting.
If your interested, the next ground school starts tomorrow (14th oct) and the one after that starts 04 November, I am uncertain of the December schools.
Hope this helps!