Royal XE36 Calculator with 12 Digit Display, Extra Large Display, Solar and Battery Power 12-digit, Extra-large Display Compact Case With 1-touch Opening last-digit Erase full Decimal System, Floating, Round Up/off Or Cutoff Full-function Memory Royal Machines XE36 Calculator with 12 Digit Display and Extra Large Display and Solar and Battery Power Auto Shut Off &amp; Last Digit Erase Compact Case Design w/One Touch Opening Full Function Memorey &amp; Grand Total Function Percent &amp; Square Root Keys