12-digit printing calculator features concave keys that are engineered with Microban antimicrobial protection that reduces the growth of microbes and bacteria to prevent discoloration and odors. Extra-large fluorescent display ensures easy viewing to help prevent reading errors. Two lines-per-second ink printer delivers two-color prints to easily differentiate positive and negative numbers. Cost-sell-margin keys make for quick and simple profit margin calculations. Printing calculator also includes one-touch change calculation, double zero key, tax calculations, change sign key, grand total key and more.