1 ton= 2000lbs (pounds)
(2 tons Iron + 1 ton Aluminum) *2000 lbs per a ton= 4000 lbs of iron + 2000 lbs of Aluminum= In total, the salvage yard sells 6000 lbs of material.
Answer: 4,000 pounds of iron and 2,000 pounds of Aluminum are sold from the Salvage yard.