Professional, heavy-duty, commercial-grade calculator offers unmatched precision and reliability for high volume environments. Design features a super large 12-digit, liquid crystal display (LCD) and well-spaced keys with PC Touch Keyboard. Print 2.7 lines per second in two colors. Cost-sell-margin keys allow you to quickly and easily solve CSM problems by entering two variables and the third appears and prints. Time/date feature displays and prints the current time or date. Functions include tax +/-, four-key independent memory, delta percent of change, change sign (+/-) key, percent key, grand total key, item count, add mode, date/non-add, backspace key and automatic constants. Calculator runs on AC power.