In Australia our currency is Australian Dollars (AUD).
We also generally accept American Express, Bankcard, Diners Club, MasterCard, Visa, JCB and their affiliates.
Currency exchange is available at banks, hotels and international airports. Australia has a goods and services tax on purchases (10%) but you may claim this and the Wine Equalisation Tax when departing our shores.
There are various currency exchange services at popular points of interest areas including Surfers Paradise, Pacific Fair and Australia Fair as well as many hotels.