General Motors has a weighted average cost of capital of 8%. GM is considering investing in a new plant that will save the company $30 million over each of the first two years, and then $20 million each year thereafter, continuing indefinitely. If the investment is $150 million, what is the net present value (NPV) of the project? A. $82.5 million B. $106.0 million C. $117.8 million D. $94.3 million