Can you please provide an explanation along with the answer?

4. Dardon Company currently produces three products from a joint process. The joint process has total costs of $250,000 per month. All three products, A, B &C, are immediately saleable as they come out of the joint process. Alternatively, any of the products could continue on with additional processing and be sold as a more complete product. The following information is available: A B Units 50,000 75,000 Immediate Sales Price $ 5 $ 10 Later Sales Price $ 10 $ 15 Unit Cost of Further Processing $ 6 $ 4