Next year, your existing machine will cost $4000 per year to run. Thereafter, the cost will increase… Show more Next year, your existing machine will cost $4000 per year to run. Thereafter, the cost will increase by 10% a year. A new machine cost $20,000 to install and a constant $3000 per year to run. If the new machine has an indefinite life and the cost of capital is 8%, when should you replace? • Show less