A 12-digit LCD allows for the use of large numbers, while two-color printing makes it easy to tell the difference between positive and negative values. Built-in calendar and clock functionality. A professional keyboard layout lets you enter numbers quickly. Cost, sell, and margin keys make determining profit margins simple, while four-key memory delivers the ability to save commonly used numbers for faster input. A built-in grand total key makes it possible to add the results of multiple calculations at the push of a button. This Sharp printing calculator is both battery and AC-powered for added flexibility.