The price for liquor is controlled by the state government, which means that prices can vary a lot. 18 out of 50 states set prices and control alcohol sales and distribution within their borders. These laws need to be continually renewed every few years, so they're subject to change from time to time.
Michigan is one of 18 states to control liquor prices and they do so by collecting an excise tax at the state level as well as taxes on purchases made within townships. The decision to tax goods.