Samsung DFX-5000 - Manual (Page 68)

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Converter
The Converter converts values for currency, length, weight,
volume, area, or temperature. In the currency converter, you can
edit or add currency exchange rates.
ᮣ In standby mode, press Menu ( ) ➔ Tools ➔
Converter.
Tip Calculator
Tip Calculator allows you to calculate a percentage amount for a
tip, and the total due for multiple payers.
ᮣ In standby mode, press Menu ( ) ➔ Tools ➔ Tip
Calculator.