public void MonthIngredientChange(string item)
        {
            int index = MonthExpenditureLabels.IndexOf(item);
            ObservableCollection <string[]> result = AdvancedQuery.GetIngredientExpenditure(expenditure_month[index], expenditure_year[index]);

            IngredientSeries.Clear();
            // Debug log
            for (int i = 0; i < result.Count; i++)
            {
                IngredientSeries.Add
                (
                    new PieSeries
                {
                    Title  = result[i][1] + " (" + result[i][2] + ")",
                    Values = new ChartValues <ObservableValue> {
                        new ObservableValue(Double.Parse(result[i][3]))
                    },
                    DataLabels = true
                }
                );
            }
        }