A school district considers two alternative plans for an athletic stadium. An engineer makes the following cost estimates for each: Concrete Bleachers. First cost, $350,000. Life is 90 years. Annual maintenance cost $2,500. Wooden Bleachers on Earth Fill. First cost, $200,000. Life is 90 years. Painting cost $12,000 every 10 years. New seats costs $40,000 every 15 years and new bleachers cost $100,000 every 30 years (dont include replacing the bleachers in year 90). Compare equivalent uniform annual costs for a 90-year period using i = 7% compounded annually. (Which one would you choose?)