CHAPTER 3- EXERCISES/PRACTICE Problem 1 Consider a cost-benefit-trade-off problem having the following data. Benefit Contribution per Unit of Each Activity Benefit 1 2 1 2 Minimum Acceptable Level 60 30 5 2 3 2 3 7 9 126 Unit cost $60 $50 a. Formulate a linear programming model for this problem on a spreadsheet. b) and fine the optimal solution