If you live in a dorm and cook your own food you can live quite cheaply. Eating out will cost you $4-8 a meal at the cheapest cafes and fast food stands.

supermarket prices=
bread 7-11p
1kg potatoes 17p
1L juice 35p
250g frozen farsh 19p
1L milk 21p
instant noodle soup (1packet=1 serving) 3p