An investment of $ 31,000 is made to improve some processes, its useful life is 5 years, this investment generates a saving of $ 8,000 per year. Presume that the market value drops by $ 5000 per year.
a. Calculate the present value if the MARR is 10% annual compound
b. Calculate the equivalent annuity if the MARR is 10% annual compound
c. Calculate the ratio of internal capital recovery
d. Calculate the capital recovery period if the MARR is 10% annual compound