4. Golden Co. manufactures a major product and a byproduct during a joint process. The byproduct can be sold separately for $5 including $1 selling cost. For the $4 net amount resulting from sale of by product, Golden currently deducts it from cost of goods sold of the major product. If Golden treats the byproduct as a joint product, Goldens overall gross margin will ______. A. No change B. Increase by $1 for each byproduct sold C. Increase by $4 for each byproduct sold. D. Increase by $5 for each byproduct sold.