High-speed two-color ribbon printer. Features: A large 12-digit (14.0 mm) blue fluorescent display with punctuation, Hi-Speed Ribbon Printer that prints at approximately 3.6 lines/sec. and is ideal for heavy duty office use; a Grand Total which adds the grand total of several calculations such as the total prices times units on an invoice; a Calendar/Clock function which displays and prints date and time; the Mark-Up Key, used to perform mark-ups, cost/sell/margin calculations, percent changes, and automatic add-on/discounts; the Average Key, which is used to find the "mean" or average; a 4-Key Memory which includes memory plus, memory minus, recall and clear memory keys. Additional Features include mark-up/profit margin key, floating (F) or fixed decimal (6-3-2-1-0), add (A) and constant (K) modes, and item count. Prints on standard paper roll and operates on AC power.