Large 10 Digit display</br>Cost/sell/margin keys</br>Tax calculations</br>Solar power</br>Quick correction key</br></br>Product Description</br></br>Large 10 digit display mini desktop calculator?? tax calculations keys?? cost/sell/margin calculation keys?? solar powered plus battery back up?? Large keys for easy input.</br><br/>http://www.amazon.com/gp/product/B01FY44UNO