The Sharp White 12 Digit Solar Powered Calculator EL-334WB is perfect for business professionals looking for convenience and comfort. The modern design and large LCD display make for easy calculations, while the cost/sell/margin keys ensure quick and accurate profit margin calculations. Enjoy a grand total key, double zero key, backspace key, automatic tax keys, percent key, and more - all powered by solar and battery backup. Make the EL-334WB your trusted business companion!