import java.util.*;
   public class Result
    {
        public static double sumOfList(List list) 
        {
            double var = 0.0;
            for (Number num : list)
                var += num.doubleValue();
            return var;
        }
        public static void main(String args[])
        {
           List obj = Arrays.asList(4.3, 5.6, 7.8);
           System.out.println(sumOfList(obj));
        }
    }