12-digit, two-color printing calculator features a large easy-to-read display and built-in tax and exchange function. Includes full decimal system: floating, fixed (0-6) with round-off, round-up or cut-off, and add mode. Two-color ribbon printer produces 3.5 lines per second on 2-1/4" plain paper. Calculator offers right shift and backspace keys for quick corrections, automatic constants, item counter, subtotal, total, grand total, independent memory, percent key, independent add register, and cost/sell/margin. Calculator operates through AC powers and weighs 3.7 lb.