Venus Company makes two products: Potion X and Potion Y. The products are usually sold at the end of a joint process Y is sold for $50 per gallon, and X is sold for $70, per gallon. If the products were processed further, X would be sold for $65 per gallon Y would be sold for $90 per gallon. It will cost $20 to process X further and $10 to process Y further.