GreenTech Industries is considering investing in a new solar panel manufacturing machine. The current machine will be functional for two more years with no disposal value. If sold now, it can fetch $80,000. The new machine costs $250,000 and requires an additional $70,000 in working capital. The expected additional cash inflows are $60,000 in the first year, and $170,000 annually for the next two years. The new machine has a lifespan of three years with no disposal value. The required rate of return is 12%. Determine the net present value (NPV) of this investment. Should the company proceed with the purchase?