A company is producing two types of storage cabinets, “Brown” and “Black”. The time requirements for each stage of production and the labour-hours available for each stage are given in the following table. The table also shows the unit profit of each type of cabinet.

Product	Stage I (Assembling)	Stage II (Finishing)	Unit profit
Brown	4	10	$150
Black	8	6	$200
Max available time (hrs/week)	100	110

 

PART A. Determine how many storage cabinets per week of each type must be produced to maximize the total profit. (Fractional units allowed).

1. Number of “Brown” cabinets?   

                              

2. Number of “Black” cabinets?  

             

3. Maximum   profit?                                     

PART B. Suppose that a single order is received for 8 “Brown” cabinets, and if it is decided that this order must be filled, determine the new values below (fractional units allowed)):-

4. Number of “Brown” cabinets?

                            

5. Number of “Black” cabinets?  

                             

• Maximum profit?       

                            

PART C. Now, in addition to the above, make allowance for an extra market constraint that the demand for the two types of cabinets is no more than 12 per week in total.  Again determine how many cabinets of each must be produced to maximize the total profit (fractional units allowed):-

7. Number of “Brown” cabinets?

                            

8. Number of “Black” cabinets?       

                           

9. Maximum profit?

                                         

• What happens to the maximum profit after each extra constraint is added?

11.Why does this happen? 

 

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