Portable commercial series calculator features a large, 12-digit fluorescent display and two-color printing. Print 3.0 lines per second with large print on paper tape. Enter two cost/sell/margin variables and the third appears and prints. Functions include time/date display, two independent tax keys, item count, delta percent of change, four-key independent memory, nonadd/subtotal key, grand total key and automatic constants. AC/DC powered calculator includes an AC adapter, but the required four AA batteries are sold separately.