Suppose that each day, Northern, Central, and Southern
California each use 100 billion gallons of water. Also assume that
Northern California and Central California have available 120
billion gallons of water, whereas Southern California has 40
billion gallons of water available. The cost of shipping 1 billion
gallons of water between the three regions is as follows. Also, you
will not be able to meet all the demand for water, so assume that
each billion gallons of unmet demand incurs...