The Consolidated Oil Company must installantipollutionequipmentinanewrenery to meet federal clean-air standards. Four design alternatives are being considered, which will have capital investment and annual operating expenses as shownbelow.Assumingausefullifeof8yearsforeach design, no market value, a desired MARR of 10% per year,determinewhichdesignshouldbeselectedonthe basis of the PW method. Conrm your selection by using the FW and AW methods. Which rule (Section 6.2.2) applies? Why?

Design Capital Investment Annual Expenses

D1 $600,000 $780,000

D2 760,000 728,000

D3 1,240,000 630,000

D4 1,600,000 574,000