You can buy a machine for $100,000 that will produce a net income, after operating expenses, of

Question:

You can buy a machine for $100,000 that will produce a net income, after operating expenses, of $10,000 per year. If you plan to keep the machine for four years, what must the market (resale) value be at the end of four years to justify the investment? You must make a 15% annual return on your investment.