Desktop calculator offers a 12-digit, angled, liquid crystal display with large, easy-to-read numbers to provide you with maximum viewing comfort. Ergonomic angle of the display provides comfort and reduces eyestrain from overhead lighting. Display indicates the operation symbol for addition, subtraction, multiplication and division during a calculation and will also show the equal sign when your result is displayed. Decimals appear in 0, 1, 2, 3, 4 and floating positions. High-quality keys incorporate a PC-like keyboard touch. Functions include add mode, tax calculation, business functions, cost/sell/margin keys, three-key memory, grand total feature, percent, and sign change, percentage add-on/discount, round off/up/down and square root.Calculator operates on solar and battery power and automatically shuts off after seven minutes of nonuse.