8-Digit angled XL-Display, Dual powered, easy to operate and ergonomically shaped non-stick plastic keys, Advanced Percentage Calculation, Tax Calculation of price plus tax/price less tax, Currency Conversion with 2 storable rates, Mark-Up Calculation via % key, Summarizing 3-key Memory. The Casio MS-8F calculator has all the basic functions you need along side additional ones like Tax & change sign key. The extra large display makes it easier on the eyes. The MS-8F includes the following functions: Tax Keys/Tax Calculations Currency Conversion (3 rates) 3 Key Memory Change Sign Key % Key Double size + Key 3 Digit Comma Marker Function Command Large plastic keys