This 12-digit calculator is perfect for the occasional user, especially in a small office or home office setting. Extra-large LCD allows easy viewing. Contemporary silver and black styling complements any modern desktop decor. Environmentally friendly calculator is made with recycled plastic. You can count on the fast and reliable, 2.7 lines-per-second ink roller printer. Cost/sell/margin keys allow quick and easy profit margin calculations (simply enter two variables and the third automatically appears). Other functions include: automatic tax keys, constants in multiplication and division, percentage add-on and discount, time/date, change sign key, large-size add and subtract keys, item count, fully selectable decimal settings, date/non-add key, and selectable rounding switches and four key independent memory. Calculator operates on four AA batteries (not included) or on the included AC adapter.