ABC Printers is considering purchasing a new printer that costs $100,000, which will replace their current printer. They are confident the new printer will give them 7 years of useful life, with estimated annual net cash inflows of $25,000, a salvage value of $5,000, but they anticipate having to spend $12,000 in maintenance costs after the 4th year. They can sell their old printer for $3,500. If their required rate of return is 16% what is the Net Present Value of this opportunity?