need help please? how do i do the calculations

Firm Y has the opportunity to invest in a new venture. The projected cash flows are as follows: Year 0: Initial cash investment in the project of $300,000. Years 1, 2, and 3: Generate cash revenues of $50,000. Years 1, 2, and 3: Incur fully deductible cash expenditures of $30,000. Year 3: Incur nondeductible cash expenditure of $10,000. Year 3: Receive $300,000 cash as a return of the initial investment Assuming a 6 percent discount rate and a 30 percent marginal tax rate, compute the NPV of the cash flows resulting from investment in this opportunity. Use Arpendix A and Appendix B. (Round discount factor(s) to 3 decimal places. Cash outflows and negative amounts should be indicated by a minus sign.) Answer is not complete. Year1 Year 2 Year 3 Year 0 (300,000) Before-tax cash flow Tax Cash Flow After Tax Cash Flow 47,150 47,150 3,772 (300,000) (300,000) (18,978) $70,000 4.000 3,560 6,000 4,000 255,360 PV NPV