Question 2

Let x be the number of packages from Duffin Publishers, and let y be the number of packages from Gorman Press.

Problem: Minimize C = 50x + 150y subject to

5x + 5y 2,500
5x + 10y 3,500
x 3y 0
x 0, y 0
Answer: Buy 420 packages from Duffin Publishers and 140 from Gorman Press for a total cost of $42,000.