using System;
using System.Xml;
public class MainClass {
private static void Main() {
XmlDocument doc = new XmlDocument();
doc.Load("ProductCatalog.xml");
XmlNodeList prices = doc.GetElementsByTagName("productPrice");
decimal totalPrice = 0;
foreach (XmlNode price in prices) {
totalPrice += Decimal.Parse(price.ChildNodes[0].Value);
}
Console.WriteLine("Total catalog value: " + totalPrice.ToString());
}
}