Hi Anna

I depends upon what life style you have. We have a high end apartment which is very expensive but a 800 sq ft 2 bed in the centre will cost you about 15,000 HK$ per month. Pizza from somewhere cheap like Pizza Hut will cost you 130 HK% a glass of wine in an OK bar will cost about 60HK$. like everywhere you can eat cheap - if you like chicken noodle soup and other chinese foods.... personally I don't. Cinema costs about 60HK$ per person. I went to see Kylie last month and the ticket was 1900HK$
groceries can be as cheap or as expensive as you want them to be. you can buy from markets or imported food from supermarkets.
You can get almost EVERYTHING here... you just pay for it.

The average LOCAL sarary is about 20,000HK$ but lots of thoes people still live with parents or in tiny apartments on the mainland - not HK island.