Casio Desktop Printing Calculator 12 Digits, Key Rollover, Key operations are stored in a buffer, so nothing is lost even during high-speed input, Automatic calculation of price plus tax, price less tax, discount, selling price, tax amount, discount amount, and margin amount, Cost/Sell/Margin - Calculate the cost, selling price, or margin of profit on an item, given the other two values, All the mark-up/mark-down capabilities of an adding machine for simplified cost and profit calculations, 2 Color Printing, Positive values are shown in black, and negative values are shown in red for easy checking, Recommended: RI-CALC-K