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Formulas and Functions with Microsoft® Excel 2003 by Paul McFedries

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20. Building Discount Formulas

IN THIS CHAPTER

Calculating the Present Value

Discounting Cash Flows

Calculating the Payback Period

Calculating the Internal Rate of Return

Case Study

In Chapter 18, “Building Investment Formulas,” you saw that investment calculations largely use the same time-value-of-money concepts as the loan calculations that you learned about in Chapter 17, “Building Loan Formulas.” The difference is the direction of the cash flows. For example, the present value of a loan is a positive cash flow because the money comes to you; the present value of an investment is a negative cash flow because the money goes out to the investment.

Discounting also fits into the time-value-of-money scheme, and you can see its relation to present ...

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