Consider the Following Network Representation of Shipment Routes Between Plants

Multiple Choice

Consider the following network representation of shipment routes between plants, a distribution center, and retail outlets. The numbers next to the arcs represent shipping costs. For example, the cost of shipping from plant 1 to distribution center 3 is equal to $2.




Assume that Plant 1 can supply 400 units and Plant 2, 500 units. Demand at the retail outlets are: Outlet 4, 300 units; Outlet 5, 250 units; Outlet 6, 450 units.
-Which constraint represents the quantity shipped to retail outlet 6?

A) X23 + X36 = 450
B) X23 + X36 + X26 = 450
C) X36 + X26 ≤ 450
D) X36 + X26 = 450
E) 3X36 + 5X26 = 450