A company imports goods at two ports: Philadelphia and New Orleans. Shipments of one product are made to customers in Atlanta, Dallas, Columbus, and Boston. For the next planning period, the supplies at each port, customer demands, and shipping costs per case from each port to each customer are as follows:

$\backslash$table$[[,$Customers,Port$],[$Port$,$Atlanta,Dallas,Columbus,Boston,Supply$],[$Philadelphia$,2,6,6,2,5000],[$New Orleans,$1,2,5,7,3000],[$Demand$,1400,3200,2000,1400,]]$