Kinky Copies may buy a high-volume copier. The machine costs $100,000 and this cost can be fully depreciated immediately. Kinky anticipates that the machine actually can be sold in 5 years for $30,000. The machine will save $20,000 a year in labor costs but will require an increase in working capital, mainly paper supplies, of $10,000. The firms marginal tax rate is 21%, and the discount rate is 8%. (Assume the net working capital will be recovered at the end of Year 5.) What is the NPV of this project?

I tried -2,979.53 and -4535.08 but they are not correct.