ABB purchased fieldbus communication equipment for a project in South Africa for $3.15 million. The net cash flows is estimated at $500,000 per year, and a salvage value of $400,000 is anticipated regardless of when it is sold. Determine the number of years the equipment must be used to obtain payback at MARR values of ( a ) 0% and 8%

per year and ( b ) 15% and 16% per year. ( c ) Use a spreadsheet to plot the payback years for all four return values.