Show your support for breast cancer awareness with this pink compact calculator. Cost/sell/margin, square root, 3-key independent memory and percent key features provide more functionality than your basic pocket calculator. Extra large 10 digit LCD display for easy viewing. Energy-saving dual power--battery and solar. A great calculator supporting a great cause. A portion of the proceeds goes to help fund research and development in the fight against breast cancer. Power Source(s): Battery; Solar; Display Notation: Numeric; Number of Display Digits: 10; Display Characters x Display Lines: 10 x 1.