Audiovox CDM-9900 - Manual (Page 128)

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Chapter 9
Calculator
Using Calculator
To use the built-in calculator:
1. Press the left softkey under Menu then press 8 2 .
2. Enter a number using your keypad. To insert a decimal point,
press the left softkey. To clear the number, press
CLR
.
3. Press to add, to subtract, to multiply or to
divide.
4. Enter another number and press to display the result.
5. To close the calculator and return to standby mode, press .
Entering a Negative Number
1. Enter a number.
2. To change the sign (+/–), press .
Calculating Tip/Total
1. Enter an amount (or display the result of the previous calculation).
2. Press the right softkey to display the result of calculating tip for
the amount (in red color).
3. Press the right softkey again to display the total amount includ-
ing the tip (in green color).
Note: To change the tip calculation percentage, press , enter a new
rate, then press .