Refer to Figure 3.14, which shows the computer solution of Problem 7.a. How much would the return for U.S. Oil have to increase before it would be beneficial to increase the investment in this stock?b. How much would the return for Huber Steel have to decrease before it would be beneficial to reduce the investment in this stock?c. How much would the total annual return be reduced if the U.S. Oil maximum were reduced to 900 shares?

Figure 3.14

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Optimal Objective Value = 8400.00000 Variable Value Reduced Cost 800.00000 0.00000 H. 1200.00000 0.00000 Constraint Slack/Surplus Dual Value 1. 0.00000 0.09333 0.00000 1.33333 200.00000 0.00000 Objective Coefficient Allowable Allowable Variable Increase Decrease 3.00000 7.00000 0.50000 H 5.00000 1.00000 3.50000 RHS Allowable Allowable Constraint Value Increase Decrease 1. 80000.00000 60000.00000 15000.00000 700.00000 75.00000 300.00000 3 1000.00000 Infinite 200.00000