Contemporary Engineering Economics 6th Edition by Chan Park

تمرين 37

The annual equivalent after-tax costs of retaining a defender machine over four years (physical life) or operating its challenger over six years (physical life) are as given in Table.
TABLE 22
If you need the service of either machine for only the next 10 years, what is the best replacement strategy Assume a MARR of 12% and no improvements in technology in future challengers.