A production engineer must choose between 1 plastic and 1 rubber coating. The first has an initial cost of 90 cents per square foot and must be replaced in 15 years once the solids that form inside the tanks are removed and which must be removed using heavy removal equipment at a cost of $ 500,000 The other coating is expected to have a useful life of 30 years, but would cost $ 2.20 per square foot. The size of the tank in which the coatings will be used is 43,560 square feet. Use the PRESENT VALUE analysis to determine which of the 2 coatings represents the least cost or the highest income at an annual interest rate of 9%.