how do i calculate net cost and PV of cashflow? (formulas)

1 Annual revenue from specialised precision part $5M 2 Weighted average cost of capital (WACC) 10% 3 Marginal tax rate 21% 4 5 6 First Alternative: Update the existing equipment to handle the new alloy 7 DF at 10% Net Cost 500 PV of Cashflow 500 8 9 10 11 12 13 14 Year 0 1 2 3 4 5 Outflow -500 -300 -300 -300 -300 -300 Depreciaton Tax shield 0 95.375 95.375 95.375 60.375 60.375 0.909090909 0.826446281 0.751314801 0.683013455 0.620921323 15