Compact two-colour printing calculator features an extra-large, 12-digit liquid crystal display (LCD) and useful functions. Print 2.3 lines per second in two colours (black and red). Enter two cost/sell/margin variables, and the third appears and prints. Calculator displays and prints current time or date. The time or date can be displayed and printed by depressing the time key. Functions include tax +/- keys, four-key memory, change sign, percent and date/non-add keys, item count, percent key and automatic constants. Calculator operates on AC/DC with the included AC adapter. Four AA batteries are sold separately.