Nippon steel's expsenses for heating and cooling a large manufacturing facility are expected to increase according to an arithmetic gradient begining in year 2. if the costs is $550000 this year (year 0) and will be $550000 again in year 1, but then are estimated to increase by $40,000 each year through year 12 , what is the equivalent annual worth in years 1 to 12 of these energy costs at an interest rate of 10% per year?