how to overcome null error exception in where clause XML LINQ

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C#

XML

Linux

Hi Friends,
i am trying to filter the nodes and store values in a List basesd on the search criteria. My problem is, in some nodes the where clause applied field(AccruedInterest) is missing. How can i overcome this, please help

public static List<AccruedClass> validaccrued()
        {
            XDocument doc = XDocument.Load("Morgan.xml");
            var ac = doc.Root.Elements("Positions")
                          .Where(item => (float)item.Element("AccruedInterest") > 0.0)//some nodes doesnot contain "AccruedInterest" so its showing null error execption
                          .Select(item => new AccruedClass
                          {
                              Cusip = item.Element("Cusip").Value != null ? item.Element("Cusip").Value : "",
                              // Symbol = item.Element("symbol").Value,
                              AccruedInterest = item.Element("AccruedInterest").Value != null ? Convert.ToDouble(item.Element("AccruedInterest").Value) : 0,
                              PriceFactor = item.Element("PriceFactor").Value != null ? Convert.ToDouble(item.Element("PriceFactor").Value) : 0,
                              Quantity = item.Element("Quantity").Value != null ? Convert.ToDouble(item.Element("Quantity").Value) : 0,                             
                          })
                          .ToList();
            List<AccruedClass> list_accr = ac.ToList<AccruedClass>();
            return list_accr;
        }