It is unhelpful when the same object is weighed or measured in different units (inches, centimetres, etc) in different locations. It is manageable because those units have a fixed relationship to each other. The enormous benefit of pricing goods and services in the dominant money of a region encounters the same challenge when the same item is priced in a different money in a different region. When the value (purchasing power) of a money varies within and/or between regions, interpreting prices