How much will be billed against my (Australian dollar) debit card if I pay 10 USD online?

I want to make a purchase online for USD 10 by using my debit card (in Australia)?|||Current exchange rates would put that at AUD 9.35, however banks never give you the best rate. On top of that they usually charge some sort of other fees just for processing a foreign transaction. You would need to talk to your bank, or research it on their website, to figure out what those fees are.