By Esme Faerber. Is it better to buy or lease a car? How does one calculate an investment return? For that matter, what exactly is an investment return? The Personal Finance Calculator provides noncomplex tools and calculations for assessing current personal wealth, determining how much debt is too much debt, understanding credit card interest rates, and more. This work clearly and concisely explains simple steps for getting one's financial life in order and saving money over both the short and long term. McGraw-Hill (2003), English, Paperback: 224 pages.