In the network representation:
Circles labeled Toronto (Node 1) and Detroit (Node 2), representing source, are on the left one below the other.
Circles labeled New York City (Node 5), Philadelphia (Node 6), and St. Louis (Node 7), representing destination, are on the right one below the other.
Circles labeled Chicago (Node 3) and Buffalo (Node 4), representing Transshipment point, are at the center one below the other.
The supply values of Toronto and Detroit are 800 and 700, respectively.
The supply values of New York City, Philadelphia, and St. Louis are 450, 350, and 300, respectively.
Node 1 and node 2, each lead to node 3 and node 4.
Nodes 3 and 4, each lead to nodes 5, 6, and 7.