Introduction to Management Science 12th Edition by Bernard Taylor

Exercise 56

In Problem, what would be the effect on the optimal solution of a reduction in production capacity at the Gary mill from 320 tons to 290 tons per week
Problem
Steel mills in three cities produce the following amounts of steel:
These mills supply steel to four cities, where manufacturing plants have the following demand:
Shipping costs per ton of steel are as follows:
Because of a truckers' strike, shipments are prohibited from Birmingham to Chicago. Formulate this problem as a linear programming model and solve it by using the computer.