How much is a metro MTR in dollars?

I'm curious, could you please clarify what you mean by "metro MTR"? Are you referring to the cost of a ticket or fare on a specific metropolitan rail system, such as the one operated by the MTR Corporation in Hong Kong? If so, it's important to note that the cost of a ticket can vary depending on factors like the distance traveled, the type of ticket purchased, and any discounts or promotions that may be available. As a result, it's difficult to give a definitive answer without more specific information. However, if you're looking for a general estimate, you may want to check the MTR Corporation's official website or contact their customer service department for more details.