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External Data Source

Source

Regular Expression
^(?:(?:[+\-]?\$?)|(?:\$?[+\-]?))?(?:(?:\d{1,3}(?:(?:,\d{3})|(?:\d))*(?:\.(?:\d*|\d+[eE][+\-]\d+))?)|(?:\.\d+(?:[eE][+\-]\d+)?))$