Currency in Christmas Island to Australian dollar (AUD A$). For 10 US dollars you can get 15.3 Australian dollars. For 100 US dollars you can get 153 Australian dollars. And the other way: For 10 Australian dollars you can get 6.79 US dollars.
Prices:
And if you plan a trip to a given region of the world, maybe cheaper than in Christmas Island will be in nearby countries? See prices in: Cocos Islands, Singapore, Indonesia, Malaysia, and Brunei.