one more:
private List<Article> GetArticles()
{
List<Article> arts = new List<Article>();
arts.Add(new Article { Name = "Name1", Price = 2.80 });
arts.Add(new Article { Name = "Name2", Price = 1.25 });
arts.Add(new Article { Name = "Name3", Price = 9.32 });
arts.Add(new Article { Name = "Name4", Price = 1.31 });
arts.Add(new Article { Name = "Name5", Price = 0.80 });
arts.Add(new Article { Name = "Name6", Price = 2.50 });
arts.Add(new Article { Name = "Name7", Price = 0.50 });
arts.Add(new Article { Name = "Total", Price = arts.Sum(l => l.Price)});
return arts;
}