When total demand exceeds total supply, which is the best thing to do?

In a balanced transportation model where supply equals demand,

An assignment problem is a special case of transportation problem where all demand and supply values equal to

The transshipment model is a special case of transportation problem where intermediate nodes are ______ between source and destination nodes

In the linear programming formulation of the transportation problem, cost of transporting one unit of the material from a supply point to a demand point appears in