I have the correct answer, but I want to know the steps on EXCEL getting there. Please show all steps, equations, and calculations. I will give a thumbs up when all the work is shown. Also, please do it the fastest/simplest way on EXCEL (for example, if you can use NPV function). Thank you!

Consider a project of the Cornell Haul Moving Company, the timing and size of the incremental after-tax cash flows (for an all-equity firm) are shown below in millions:

0 -990

1 $125

2 $250

3 $375

4 $500

The firm's tax rate is 34 percent; the firm's bonds trade with a yield to maturity of 8 percent; the current and target debt-equity ratio is 2; if the firm were financed entirely with equity, the required return would be 10 percent. Using the weighted average cost of capital methodology, what is the NPV? Correct answer is given: $12,494,644