The Coffee Counter charges $9 per pound for Kenyan French Roast coffee and $8 per pound for Sumatran coffee. How much of each type should be used to make a 20 pound blend that sells for $ 8.50 per pound? The Coffee Counter should mix pounds of Kenyan Roast coffee and pounds of Sumatran coffee to make 20 pounds of a blend that sells for $8.50 per pound.