private static void FillTotalWeight() { DataChunk weightData = _weightColumn.Data.First(); DataChunk quantityData = _quantityColumn.Data.First(); DataChunk totalWeightData = _totalWeightColumn.Data.First(); for (int i = 0; i < weightData.Entries.Count; i++) { double weight = double.Parse(weightData.Entries.ElementAt(i), NumberStyles.Any, CultureInfo.InvariantCulture); int quantity = int.Parse(quantityData.Entries.ElementAt(i)); double totalWeight = weight * quantity; totalWeightData.AddEntry(totalWeight.ToString().Replace(",", ".")); } CalculateTotalWeightSummary(); }