Financial Calculator for Dummies is perfect for everyday people looking to take charge of their personal finances. The keys are clearly labeled with words, not abbreviations, and are color-coded for easy use. Complicated and rarely used financial functions are left out. Functions include calculating monthly payments, calculating interest rates, determining principal amounts and more. Calculator is designed to help you understand your credit card debt, calculate loan payments, plan for college costs and set retirement and savings goals. The large, 10-digit display is easy to read with extra-large digits (13mm) and includes a booklet with everyday examples in plain English. Battery-powered calculator also features plastic keys and runs on a CR2025 battery.