Katsen Coffee has two divisions, Roasting and Brewing. The Roasting division can sell its products to an external market for $15 per unit. The division's variable manufacturing costs are $4.5 per pound and fixed manufacturing costs are $0.90 per pound.

1. Now assume the Roasting division is currently at maximum capacity, selling all the beans they can roast to their external customers. What internal price should be set to transfer a pound of coffee from the Roasting division to the Brewing division?