Three varieties of coffee-Coffee A Coffee B, and Coffee C-are combined and roasted yielding a 53-b batch of coffee beans. Twice as many pounds of Coffee C, which retails for $11.24 per b, are needed as
Coffee A which sells for $15.99 per lb. Coffee B retails for $13.99 per b. How many pounds of each coffee should be used in a blend that sells for $13.34 per b?