DataDynamica Precision Financial Calculator For detailed definitions of IRR and NPV, click the link above then select User's Manual from the menu. Or, click here to view the page without menu sidebar. 


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James Ko, Ph.D. 
Are you using a false IRR from Excel? Tell me more If you say you are not a person to do this kind of big projects, at least you should have a tool to compare whether to lease a car paying monthly payments or purchase a new one. Precision Financial Calculator provides you more capabilities of scenario analysis and more interesting realworld examples. Precision Financial Calculator is not just like a numeric calculator you are playing here. The user's manual provides you a thorough understanding of financial calculations. If you are looking for how NPV and IRR are derived, you will appreciate what the author, Dr. Ko, can offer you in the booklet.
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