There are discounts available depending on the country that you are from based on an ABC category developed by the University of the Nations. Note that discounts only apply to the lecture phase of the school and does not include the cost of flying/driving here, transport, outreach fees. The lecture fees cover food, water, accommodation, internet, transport for school related activities, and basic resources for note-taking.
A – AUD$3950-$4150
B – AUD$2800
C – AUD$1800
Refer to this link to see what category your country falls under.