12-digit printing calculator prints 2.4 lines per second in two colors. Offers cost/sell/margin functions, tax and currency exchange, decimal selector (0 - 3), subtotal, total, grand total functions. Provides profit margin percentage, mark-up/mark-down key, right shift for quick correction, three-digit markers, 5/4 rounding, average function and independent memory. Calculator includes AC adapter. Also operates on four AA batteries (sold separately).