TIle case where the supply exceeds the demand can be demonstrated by assuming that the
demand at Denver is 1900 cars only. In this case, we need to add a dummy distribution center to
"receive" the surplus supply. Again, the unit transportation costs to the dummy distribution center
are zero, unless we require a factory to "ship out" completely. In this case, we must assign a
high unit transportation cost from the designated factory to the dummy destination.