Heavy-duty commercial calculator features one-touch sales tax keys, two-color printing, metal paper roll holder, extra-large fluorescent display with 12 digits, dust cover and a kickstand. The kickstand lets you position calculator at a comfortable viewing angle. Double Injection Keys offer durable numbers because the number is not a decal, but part of the actual key. Print 4.8 lines per second with positive numbers in black and negative numbers in red. Functions include delta percent, up/off/down rounding, tax calculation tip, clock/calendar, sign change, item count, markup, markdown, cost/sell/margin, memory and grand total. Calculator displays the time and date when you are not calculating. Decimal positions are in add mode, 0, 2, 3, 4,6, and floating. Calculator runs on AC power.