Casio MJ-12D 12 Digit Desktop Calculator with Large Display for Office, Shop & Business Use

The Casio MJ-12D is a 12-digit desktop calculator that delivers fast, accurate calculations for everyday office and business use. With a large, easy-to-read display and dual solar-and-battery power, it is designed to work reliably across all lighting conditions — making it a practical choice for billing counters, administrative desks, and accounting workstations throughout Ludhiana and Punjab. Available at Raju Stationery Mart, the MJ-12D brings Casio's trusted build quality to B2B buyers who need consistent performance without complexity.

Fitted with responsive plastic keys and percentage calculation functions, the Casio MJ-12D handles the full range of routine business tasks — from shop billing and stock calculations to school fee tallying and office expense tracking. Its compact, professional form factor fits neatly on any desk without occupying excess workspace, and the lightweight design means it can be moved between departments or counters as needed. The dual power system ensures zero downtime even in areas with variable natural lighting.

Raju Stationery Mart, Ludhiana supplies the Casio MJ-12D in bulk to schools, colleges, corporate offices, hospitals, banks, and government departments across Punjab. All institutional orders come with GST-compliant invoices for smooth input tax credit processing. Established in 1986, Raju Stationery Mart has been a dependable B2B stationery and office equipment supplier for over 38 years, offering competitive bulk pricing and reliable local delivery across Ludhiana.

• Use the percentage key for quick GST calculations: Enter the base amount, press the percentage key with the applicable GST rate (5%, 12%, 18%, or 28%), and the tax amount is displayed instantly — no manual formula needed.
• Position under natural or ambient light: The solar cell on the MJ-12D charges under standard office fluorescent lighting; place the calculator where the panel receives consistent light to maximise solar operation and reduce battery drain.
• Use the Grand Total (GT) function for running sums: When totalling multiple invoices or purchase entries, use the GT key to accumulate subtotals automatically rather than re-entering figures.
• Press the All Clear (AC) key before each new calculation: This clears all pending operations and memory, preventing carry-over errors from previous entries — a critical habit in busy billing environments.
• Keep the display clean with a dry cloth: Dust and smudges on the large display can reduce readability; wipe gently with a dry, lint-free cloth — never use liquid cleaners near the screen or solar panel.
• Replace the backup battery before it depletes fully: When the display fades in low-light conditions, replace the LR1130 cell promptly. A leaking depleted battery can corrode the internal contacts and affect performance.
• Store flat on a desk surface: The MJ-12D's non-slip base is designed for horizontal desktop use; storing it upright for extended periods can put pressure on the keys and affect their responsiveness over time.