What would I get with 2nd in chemistry, general maths and biology, 11th in advanced English and 5th in modern because the ATAR calculator said I would only get like 80...
Well, if you place your raw internal marks into an ATAR calculator the result you get is likely to be far too low and completely inaccurate, because those marks are moderated. If you would like an estimate, read through this first http://community.boredofstudies.org/showthread.php?t=279027 and then make a thread on the topic.