Heavy-duty printing calculator features a 14-digit, two-color illuminated display. Print 4.1 lines per second with the high-speed, two-color ink ribbon. Positive numbers are printed in black, and negative numbers are printed in red. Functions include tax calculation tip, cost/sell/margin, double/triple zero keys, up/off/down rounding, sign change, item count, memory and grand total. Decimals are at 0, 2, 3, 4, 6, add mode and F (floating). Calculator runs on AC power.