Introduction to Management Science 12th Edition by Bernard Taylor

Exercise 74

A national catalog and Internet retailer has three warehouses and three major distribution centers located around the country. Normally, items are shipped directly from the warehouses to the distribution centers; however, each of the distribution centers can also be used as an intermediate transshipment point. The transportation costs ($/unit) between warehouses and distribution centers, the supply at the warehouses (100 units), and the demand at the distribution centers (100 units) for a specific week are shown in the following table:
The transportation costs ($/unit) between the distribution centers are
Determine the optimal shipments between warehouses and distribution centers to minimize total transportation costs.