Thanks a lot Rod.
I'm slightly skeptical though; A 30 in Chem with the results I have in a BELOW AVERAGE COHORT? Same with Biology and English. I think you may have misread that part. (Below average as in 'TAFE below average bad')
Hey, those scores are assuming that your SAC scores stay the same. It is way too hard to determine how your SACS will scale.... And also, even if you are in a bad cohort, if you stay rank 1 or smash the exam your SAC scores won't change too much, they can even go up.
So yeah don't worry too much about SAC scores etc, just try to knuckle down 2 more months of hard work at smash those exams.
If your SAC scores scale down for English and biology and you still get those kind of exam scores, you still should be able to get 40-42 in english and 37-40 in biology.
For chemistry however if your SAC scores go down a lot you might be looking at 25-30.
Hope that helps! Best of luck for the year!
EDIT
And those study scores should comfortably get you 75+