20 , 1.20 4. (20 pts.) Phoenix Corporation has a joint process that produces three products: X, Y and Z. Each product may be sold at split-off or processed further and then sold. Joint- processing costs for a year amount to $100,000. Other data follow: Sales Value Additional Processing Sales Value Productat Split-off Costs after X $128,000 Y 50,000 16,000 26,000 20,000 $160,000 77,000 40,000 Z 25,600 What is the net effect (in terms of profit) of processing further all three a) products b) Should all products be processed further, and if not, which ones should