The Casio DJ-120D Desktop Calculator is a reliable and efficient 12-digit desktop calculator designed for everyday business, office, and commercial applications. It features a large, easy-to-read LCD display and dual power operation (solar and battery) for uninterrupted performance. Equipped with a 150-step Check & Correct function, it allows users to review and edit previous calculations with ease. Additional features include percentage and mark-up calculations, independent and grand total memory, square root function, decimal and rounding selectors, key rollover for fast typing, and dedicated 00/000 keys for quick data entry. Its durable design and user-friendly operation make it an ideal choice for accounting, bookkeeping, retail, finance, and general office calculations.