The distribution system for the Herman Company consists of three plants, two warehouses, and four customers. Plant capacities and shipping costs per unit (in \$) from each plant to each warehouse are as follows: Customer demand and shipping costs per unit (in \$) from each warehouse to each customer are as follows. Suppose that shipments between the two warehouses are permitted at $2 per unit and that direct shipments can be made from Plant 3 to Customer 4 at a cost of $7 per unit. What is the minimum total transport cost of the whole network? A. 11220 B. 13210 C. 11120 D. 11000 E. 12220