The issue you are experiencing with the CASH OUT operation in the POS when trying to withdraw an amount containing a comma, instead of getting this amount out in logs and it's getting added to the cash present in the POS, it could be caused by a few different things:

1. Incorrect Format: The amount may not be in the correct format. Make sure that the amount is entered in the correct format, such as using a period instead of a comma for the decimal separator.

2. Currency Settings: The currency settings in POS may be configured incorrectly. Verify that the currency settings for your POS are correct and match the format of the amount you are trying to withdraw.

3. Regional settings: Your regional settings may be set to use a comma as the decimal separator. This can cause the POS to interpret the comma as a separator instead of a decimal point.

4. Custom Code: Custom code or third-party apps may have been installed that could be interfering with the POS functionality.

You can try changing the format of the amount, checking the currency settings and the regional settings, and disabling any conflicting modules. If the problem persists, you can also check the logs to see if there's any error messages that can give you a better idea of what's causing the issue.

Another thing you could do is to check the POS configuration, specifically the field Decimal Precision, if this field is set to 2 that means that the POS is not