12-digit calculator provides heavy-duty durability that's perfect for power users & the everyday advanced user in busy office settings. Two-color, 4.8 line-per-second ribbon printer is fast & reliable for consistently legible results. Large, fluorescent display offers easy viewing to help prevent reading errors. Professional keyboard layout with a left-side total key helps you quickly & accurately input data for fast calculations with minimal errors. AC-powered calculator also includes markup key, percent changes, automatic add-on / discounts calculations, automatic tax keys & more.