Product::getFieldValueCaption

protected function getFieldValueCaption(string $fieldName, $fieldValue, string $actualOrCurrent = null): string
{
	//todo Temporary decision. Can't use \Bitrix\Crm\Service\Localization::getFieldValueCaption because there's no factory for products
	if ($fieldName === 'TAX_RATE')
	{
		return number_format($fieldValue, 2, ',', '').'%';
	}

	if (is_numeric($fieldValue) || is_int($fieldValue) || is_float($fieldValue))
	{
		return number_format($fieldValue, 2, ',', '');
	}

	if (empty($fieldValue))
	{
		return Loc::getMessage('CRM_COMMON_EMPTY');
	}

	return (string)$fieldValue;
}