Can I please get help with the attached spreadsheet?

Chapter 8 Webmasters.com has developed a powerful new server that would be used for corporations' Internet activities. It would cost $10 million at Year 0 to buy the equipment necessary to manufacture the server. The project would require net working capital at the beginning of each year in an amount equal to 10% of the year's projected sales; for example, NWC0 = 10%(Sales1). The servers would sell for $24,000 per unit, and Webmasters believes that operating costs would amount to $18,500,000 per year. The server project would have a life of 4 years. If the project is undertaken, it must be continued for the entire 4 years. Also, the project's returns are expected to be highly correlated with returns on the firm's other assets. The firm believes it could sell 1,000 units per year. The equipment would be depreciated over a 5-year period, using MACRS rates. The estimated market value of the equipment at the end of the project's 4-year life is $500,000. Webmasters' federal-plus-state tax rate is 40%. Its discount rate is 10%. a. Develop a spreadsheet model, and use it to find the project's NPV, IRR, and payback. Key Output: NPV = IRR = MIRR = Part 1. Input Data (in thousands of dollars) Equipment cost Net WC/Sales First year sales (in units) Sales price per unit Variable cost per unit Nonvariable costs $10,000 10% 1,000 $24.00 $17.50 $1,000 Part 2. Depreciation and Amortization Schedule Year Initial Cost Equipment Depr'n Rate Equipment Depreciation Dollars Ending Book Val: Cost - Accum Depreciation Part 3. Net Salvage Values, in Year 4 Estimated Sales Price in Year 4 Book Value in Year 4 Expected Gain or Loss Taxes paid or tax credit Net cash flow from salvage Market value of equipment at Year 4 Tax rate WACC 1 20.0% Years 2 32.0% Equipment $500 40% 10% 3 4 19.0% 12.0% Accum'd Depr'n Part 4. Projected Net Cash Flows (Time line of Annual Cash Flows) Years 0 1 2 3 4 0 1 2 3 4 Investment Outlays at Time Zero: Equipment Operating Cash Flows over the Project's Life: Sales revenue Operating Costs Depreciation (equipment) Oper. income before taxes (EBIT) Taxes on operating income (40%) After-tax operating income Add back depreciation Operating cash flow Terminal Year Cash Flows: Required level of net working capital Required investment in NWC Terminal Year Cash Flows: Net salvage value Net Cash Flow (Time line of cash flows) Part 5. Key Output: Appraisal of the Proposed Project Net Present Value (at 10%) IRR MIRR Payback (See calculation below) Data for Payback Years Net cash flow Cumulative CF Part of year required for payback 0 1,000 $24.00 $17.50