Is this correct? If it isn't, why not?

5) Calculate PB, DPB, NPV, IRR and PI for the following project: net cash flows for this 5 year project are: $250,000, $300,000, $400,000, $500,000 and $200,000 with an initial investment of $425,000. You use a discount rate of 12% and your tax rate is 30%. The machine will be sold in year 5 for $37,500 and it is 5-year property. The sale of the machine has not been calculated in year 5's net cash flow of $200,000. (20 points) Cost Depreciation Book Value at time of sale Scrap Value Profit/Loss Tax @ 30% After Tax Cash Flow $425,000 -$400,520 $24,480 $37,500 $13,020 $3,906 $33,594 5 Year Project Initial Investment MACRS Revenue 0 1 4 -$425,000 20.00% | 32.00% | 19.20%| 11.52%| 11.52% $250,000 $300,000$400,000 $500,000 $200,000 Depreciation -$85,000 -$81,600 -$48,960-$48,960 136,000 Net Income Before Tax Tax @ 30% Net Income After Tax Add depreciation $165,000 $164,000 $318,400 $451,040 $151,040 $49,500$49,200 $95,520 $135,312 $45,312 $115,500 $114,800| $222,880$315,728 $105,728 $200,500 $250,800 $304,480 $364,688 $154,688 Total Cash Flow After Tax PVF Present Value of cash flows @ 12% -$425,000$200,500 $250,800 $304,480 $364,688 $154,688 0.5674 $179,018$199,936 $216,723 $231,766$87,774 0.8929 0.7972 0.7118 0.6355 NPV IRR Pl PB DBB $850,156 50.41% 2.00 1.10 2.27