A machine that cost $120,000 three years ago can be sold now for $54,000. Its market value for the next 2 years is expected to be $40,000 and $20,000 one year and two years from now, respectively. Its operating cost is expected to be $23,000 for the next 2 years. A new improved machine that can be purchased for $138,000 will have an economic life of 5 years, an operating cost of $9,000 per year, and a salvage value of $32,000 after 5 years. Assume an interest rate of 10% per year. Which of the following is the most economical option? The presently owned machine should be sold now The presently owned machine should be sold 1 year from now The presently owned machine should be sold 2 years from now