-39 Big-J Construction Company, Inc. is conducting a routine periodic review of existing field equipment. They use a MARR of 20%. This includes a replace- ment evaluation of a paving machine now in use. The machine was purchased 3 years ago for $200,000, The paver's current market value is $120,000, and yearly operating and maintenance costs are as follows. Operating Maintenance Market Value Year, Cost in Cost in if Sold n Year n Year n in Year n 1 $15,000 $ 9,000 $85,000 15,000 10,000 65,000 3 17,000 12,000 50,000 4 20,000 18,000 40,000 25,000 20,000 35,000 6 30,000 25,000 30,000 7 35,000 30,000 25,000 Data for a new paving machine have been ana- lyzed. Its most economic life is at 8 years, with a minimum EUAC of $62,000. When should the existing paving machine be replaced