Printing Calculator Features An Extra-Large, 12-Digit Display That Shows Crisp, Sharp Numbers For Easy Viewing. Two-Color Ink Printer Allows You To Quickly See Both Positive And Negative Numbers To Prevent Reading Errors. Dual-Power Operation Lets You Use Plug Directly Into An Outlet Or Use Batteries For On-The-Go Calculations. Calculator Also Includes Cost/Sell/Margin, Tax Calculation, Clock/Calendar Function, Decimal Selector, Currency Exchange Calculations And More.