14 Digits Reprint Function Large display Large, easy-to-read display. Key rollover Key operations are stored in a buffer, so nothing is lost even during high-speed input. Plastic keys Designed and engineered for easy operation. Cost/Sell/Margin Calculate the cost, selling price, or margin of profit on an item, given the other two values. Tax calculation Automatic calculation of price plus tax, price less tax, discount, selling price, tax amount, discount amount, and margin amount. Regular percent Regular percentage calculations. Mark-up/Mark-down All the mark-up/mark-down capabilities of an adding machine for simplified cost and profit calculations. Line printing Line printing for higher speed, superior print quality, and quieter operation. 2-color printing Positive values are shown in black, and negative values are shown in red for easy checking. 3.5 line-per-second printing The value indicates the number of lines printed per second.