Engineering Economy 7th Edition by Leland Blank ,Anthony Tarquin

Exercise 4

An engineer at Delphi Systems is considering the projects below, all of which can be considered to last indefinitely. The company's MARR is 13% per year.
a) Determine which projects should be selected on the basis of IROR if the budget limitation is $39,000.
b) What is the overall rate of return if the money not invested in projects is assumed to earn a rate of return equal to the MARR