In the following table the transportation cost for Gregory Bier Corp. are provided: Destination Source W X Y Z Supply $132 A $116 $250 $110 220 $220 $230 $180 $178 B 300 $152 $173 $196 $164 C 435 Demand 160 110 200 200 The given transportation problem is unbalanced To balance the given transportation problem, a dummy destination should be added. To balance the given transportation problem, the demand for the introduced dummy should be 285. The starting solution using the northwest-corner method is: (Note: You must enter a shipment in every cell, even if the shipment is 0.)