Casio Portable Calculator with Printer, 12 Digital, Large, easy-to-read display, Key operations are stored in a buffer, so nothing is lost even during high-speed input, Calculate the cost, selling price, or margin of profit on an item, given the other two values, Tax calculation and currency conversion functions, " % " key gives quick access to prices and profits, and also delivers add-ons, discounts, ratios and increase/decrease values, A symbol (+, -, ×, ÷) on the display indicates the status of operation you are currently performing.