static void Main() { Display someDisplay = new Display("4.5inch", "165Million"); Battery someBattery = new Battery("Varta", 10.00, 10.00); GSM myPhone = new GSM("G3", "JIAYU", "Pencho", 390.00m, someBattery, someDisplay); myPhone.AddCallToHist(DateTime.Now, "088617555", 180); myPhone.AddCallToHist(DateTime.Now, "099953312", 2000); myPhone.AddCallToHist(DateTime.Now, "125989364", 369); myPhone.AddCallToHist(DateTime.Now, "058933153", 600); myPhone.DisplayCallHistory(); Console.WriteLine("Price for all calls"); //calculating totalPrice for all calls decimal pricePerMinute = 0.37m; decimal totalPrice = 0m; totalPrice=myPhone.TotalPriceCall(pricePerMinute); Console.WriteLine(totalPrice); //Remove LongestCall and calculating price again myPhone.RemoveLongestCall(); Console.WriteLine("Price for all calls after removing the longest call"); totalPrice = myPhone.TotalPriceCall(pricePerMinute); Console.WriteLine(totalPrice); myPhone.DisplayCallHistory(); myPhone.ClearCallHistory(); Console.WriteLine("This is cleared call history:"); myPhone.DisplayCallHistory(); }