premise: The United States dollar is used in the vending machine.
hypothesis: United States dollar . The United States dollar ( sign : $ ; code : USD ; also abbreviated US$ and referred to as the dollar , U.S. dollar , or American dollar ) is the official currency of the United States and its insular territories per the United States Constitution . Besides the United States , it is also used as the sole currency in two British Overseas Territories in the Caribbean : the British Virgin Islands and Turks and Caicos Islands .