A Company Needs to Ship 100 Units from Roanoke to Washington

Essay

A company needs to ship 100 units from Roanoke to Washington at the lowest possible cost.The costs associated with shipping between the cities are:
To
$$\begin{array} { l c c c } \text { From } & \text { Lexington } & \text { Washington } & \text { Charlottesville } \\\hline \text { Roanoke } & 50 & - & 80 \\\text { Lexington } & - & 50 & 40 \\\text { Charlotterville } & - & 30 &\end{array}$$
Draw the network representation of this problem.