Citizen SDC-3920 User Manual

The calculator automatically switches off after approximately 10 minutes of inactivity.

Instructions for replacing the backup battery, including screw removal and reset procedure.

Explanation of the function for each key on the calculator, e.g., [M+], [CE/C], [SET].

Defines symbols displayed on the calculator screen, such as MEMORY, ERROR, and TAX.

Examples demonstrating basic arithmetic operations, percentages, and chained calculations.

Examples illustrating how to use memory functions (M+, M-, MRC) for calculations.

Demonstrates performing calculations with a constant value applied repeatedly.

Shows how to clear an overflow error and reset the calculator for further use.

Examples for calculating price mark-up and mark-down percentages.

Illustrates using the calculator's two independent tax rate settings (TAXI, TAXII).