Impact Printing makes two kinds of computer paper using premium or ordinary quality stock. They have a contract to supply at least 5000 cases of paper. There is only enough stock to make 4000 cases of premium paper, but ample stock for ordinary paper. Both kinds are made with the same machine and 1200 hours of machine time are available. Premium paper takes 18 minutes per case to make and ordinary paper takes 12 minutes per case. The profit on each is $4/case and $3/case, respectively.

1. Write the constraints for the problem. (HINT: you need to convert the hours to minutes so that the inequality has all minutes).

1. Write the profit equation.

1. Graph the constraints and find the corner points.