Consider a project to supply Detroit with 27,000 tons of machine screws annually for automobile production. You will need an initial $4,700,000 investment in threading equipment to get the project started; the project will last for 5 years. The accounting department estimates that annual fixed costs will be $1,125,000 and that variable costs should be $210 per ton; accounting will depreciate the initial fixed asset investment straight-line to zero over the 5-year project life. It also estimates a salvage value of $500,000 after dismantling costs. The marketing department estimates that the automakers will let the contract at a selling price of $314 per ton. The engineering department estimates you will need an initial net working capital investment of $450,000. You require a return of 13 percent and face a tax rate of 24 percent on this project.

Suppose you believe that the accounting departments initial cost and salvage value projections are accurate only to within 5 percent; the marketing departments price estimate is accurate only to within 15 percent; and the engineering departments net working capital estimate is accurate only to within 10 percent. What are your worst-case and best-case NPVs for this project?