1. BA250 MANAGEMENT SCIENCE EXAMPLE PROBLEMS
CHAPTER 4
#13,21,32

2. Formulate a linear programming model for this problem.
13) The Kalo Fertilizer Company produces two brands of lawn fertilizerSuper Two and Green Growat plants in Fresno, California, and Dearborn, Michigan. The plant at Fresno has resources available to produce 5,000 pounds of fertilizer daily; the plant at Dearborn has enough resources to produce 6,000 pounds daily. The cost per pound of producing each brand at each plant is as follows:
The company has a daily budget of $45,000 for both plants combined. Based on past sales, the company knows the maximum demand (converted to a daily basis) is 6,000 pounds for Super Two and 7,000 pounds for Green Grow. The selling price is $9 per pound for Super Two and $7 per pound for Green Grow.
Formulate a linear programming model for this problem.
Product
Fresno
Dearborn
Super Two 2$ 4$
Green Grow 3$

3. 21) The Midland Tool Shop has four heavy presses it uses to stamp out prefabricated metal covers and housings for electronic consumer products. All four presses operate differently and are of different sizes. Currently the firm has a contract to produce three products. The contract calls for 400 units of product 1; 570 units of product 2; and 320 units of product 3. The time (in minutes) required for each product to be produced on each machine is as follows:
Machine 1 is available for 150 hours, machine 2 for 240 hours, machine 3 for 200 hours, and machine 4 for 250 hours. The products also result in different profits, according to the machine they are produced on, because of time, waste, and operating cost. The profit per unit per machine for each product is summarized as follows:
Formulate this problem as a linear programming model.
MACHINE
PRODUCT 1 2 3 4 35 41 34 39 40 36 32 43 38 37 33
MACHINE
PRODUCT 1 2 3 4
7.8$
7.8
8.2
7.9
6.7
8.9
9.2
6.3
8.4
8.1
9.0
5.8

4. The Mill Mountain Coffee Shop blends coffee on the premises for its customers. It sells three basic blends in 1-pound bags, Special, Mountain Dark, and Mill Regular. It uses four different types of coffee to produce the blends Brazilian, mocha, Columbian, and mild. The shop has the following blend recipe requirements:
Blend Mix Requirements Selling Price/Pound
Special At least 40% Columbian, at least 30% mocha $6.50
Dark At least 60% Brazilian, no more than 10% mild
Regular No more than 60% mild, at least 30% Brazilian
The cost of Brazilian coffee is $2.00 per pound, the cost of mocha is $2.75 per pound, the cost of Columbian is $2.90 per pound, and the cost of mild is $1.70 per pound.
The shop has 110 pounds of Brazilian coffee, 70 pounds of mocha, 80 pounds of Columbian, and 150 pounds of mild coffee available per week.
The shop wants to know the amount of each blend it should prepare each week to maximize profit. Formulate a linear programming model for this problem.