英语翻译题,要是用google translate的您还是甭回答了.谢谢大侠相助

英语翻译题,要是用google translate的您还是甭回答了.谢谢大侠相助A manufacturing workshop plans to buy a new machine that requires an initial investment of $28,000. The cost of maintaining the machine (paid at the end of each year) is $2,000 per annum. The machine generates a revenue of $5,000 at the end of first year (as the staff is getting trained with the machine) and $12,000 per annum thereafter for 6 more years. If the rate of interest is 8% per annum compounded annually, what is the net present value of this machine? Do you recommend the investment?