X Company is considering replacing one of its machines in order to save operating costs. Operating costs with the current machine are $64,000 per year; operating costs with the new machine are expected to be $40,000 per year. The new machine will cost $73,000 and will last for six years, at which time it can be sold for $2,000. The current machine will also last for six more years but will not be worth anything at that time. It cost $31,000 three years ago but is currently worth only $8,000 Assuming a discount rate of 5%, what is the incremental net present value of replacing the current machine with the new machine