The Australian Dollar is the currency ofAntarctica, Australia, Christmas Island, Cocos (Keeling) Islands, Heard & McDonald Islands, Kiribati, Nauru, Norfolk Island, Tuvalu
The US Dollar is the currency ofAmerican Samoa, Caribbean Netherlands, British Indian Ocean Territory, U.S. Outlying Islands, British Virgin Islands, U.S. Virgin Islands, Cambodia, Ecuador, El Salvador, Guam, Marshall Islands, Micronesia, Northern Mariana Islands, Palau, Panama, Puerto Rico, Timor-Leste, Turks & Caicos Islands, United States, Zimbabwe