A public utility company is considering the following two alternative systems for a water treatment plant. Determine the best alternative using the incremental rate of return method. (yes I want the rates). The MARR is 6% per year. Alt A Alt B 800,000 Initial costs Maintenance $/yr Sales $/yr 1,200,000 22,000 250,000 30 18,000 140,000 22 Life (yrs)