Reconsider the original version of the Dewright Co. problem presented in Sec. 7.5 and summarized in Table 7.5. After further reflection about the solution obtained by the simplex method, management now is asking some what-if questions.

(a) Management wonders what would happen if the penalty weights in the rightmost column of Table 7.5 were to be changed to 7, 4, 1, and 3, respectively. Would you expect the optimal solution to change? Why?

C

(b) Management is wondering what would happen if the total profit goal were to be increased to wanting at least $140 million (without any change in the original penalty weights).

Solve the revised model with this change.

C

(c) Solve the revised model if both changes are made.