a construction company that you work for asked you to perform an economic study to determine if it would be desirable to purchase a new road master scraper . you have assembled the following information . a new road master will cost $40000 and will have a service life of 20 years if a good maintenance plan is followed. maintenace operating cost wil amount to $12000 for year one and will increase $6000 each year that is in use .the market for used scrapers is shot and yu cannot plan to sell the road master for more than $0 whenever you decide to retire it ( if you do decide to purchase it ). use a value of 12% for marr and determine the number of years you should use for the economic life of the road master in your economic study