Do basic math with this Casio 10-digit standard function calculator. Its large display and buttons make it easy to use, and it’s powered by the sun, with backup batteries when you need to keep working at night. This Casio 10-digit standard function calculator comes with a wallet-style case for easy transport. LCD display Shows results up to 10 digits. Independent memory Save or remove data with one button. Calculation functions Along with the profit-margin percent function help you calculate important data. Two-way power The calculator can be solar-powered when light is sufficient and battery-powered in dim light.