maintenance cost for a small bridge with an expected 60-year life are estimated to be $2000 each year for the first five years , followed by a $20,000 expenditure in the 15 th year and a $10,000...

maintenance cost for a small bridge with an expected 60-year life are estimated to be $2000 each year for the first five years , followed by a $20,000 expenditure in the 15 th year and a $10,000 expenditure in year thirty . if I=10% per year , the equivalent uniform annual cost over the entire 60-year-period will be ?