Please explain how you determine which cash flows to enter (specifically, why is cash flow 3 = $420,000 and not $350,000?) and solve

Your firm has an average-risk project under consideration. You choose to fund the project in the same manner as the firm's existing capital structure. If the cost of debt is 9.50%, the cost of preferred stock is 10.00%, the cost of common stock is 12.00%, and the WACC adjusted for taxes is 11.50%, what is the project's NPV given the expected cash flows listed here? 1,150,904898,415300,90448,415