How to: Add Custom Totals

<Window x:Class="HowToBindToMDB.MainWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:dxpg="http://schemas.devexpress.com/winfx/2008/xaml/pivotgrid" 
        Title="MainWindow" Height="350" Width="525"  Loaded="Window_Loaded">
    <Grid>
        <dxpg:PivotGridControl HorizontalAlignment="Left" Name="pivotGridControl1" 
                               VerticalAlignment="Top" RowTotalsLocation="Far">
            <dxpg:PivotGridControl.Fields>
                <dxpg:PivotGridField Name="fieldCategoryName" FieldName="CategoryName" 
                                     Area="RowArea" Caption="Category" 
                                     TotalsVisibility="CustomTotals">
                    <dxpg:PivotGridField.CustomTotals>
                        <dxpg:PivotGridCustomTotal SummaryType="Average" />
                        <dxpg:PivotGridCustomTotal SummaryType="Sum" />
                        <dxpg:PivotGridCustomTotal SummaryType="Max" />
                        <dxpg:PivotGridCustomTotal SummaryType="Min" />
                    </dxpg:PivotGridField.CustomTotals>
                </dxpg:PivotGridField>
                <dxpg:PivotGridField Name="fieldProductName" FieldName="ProductName" Area="RowArea" 
                                     Caption="Product Name" />
                <dxpg:PivotGridField Name="fieldOrderYear" FieldName="OrderDate" Area="ColumnArea" 
                                     Caption="Order Year" GroupInterval="DateYear" />
                <dxpg:PivotGridField Name="fieldExtendedPrice" FieldName="Extended Price" 
                                     Area="DataArea" CellFormat="c0" />
            </dxpg:PivotGridControl.Fields>
        </dxpg:PivotGridControl>
    </Grid>
</Window>

using System.Data;
using System.Data.OleDb;
using System.Windows;
using DevExpress.Xpf.PivotGrid;
using HowToBindToMDB.NwindDataSetTableAdapters;
using System;

namespace HowToBindToMDB {
    /// <summary> 
    /// Interaction logic for MainWindow.xaml 
    /// </summary> 
    public partial class MainWindow : Window {
        NwindDataSet.SalesPersonDataTable salesPersonDataTable = new NwindDataSet.SalesPersonDataTable();
        SalesPersonTableAdapter salesPersonDataAdapter = new SalesPersonTableAdapter();

        public MainWindow() {
            InitializeComponent();
            pivotGridControl1.DataSource = salesPersonDataTable;
        }

        private void Window_Loaded(object sender, RoutedEventArgs e) {
            salesPersonDataAdapter.Fill(salesPersonDataTable);
            object[] filter = new object[15];
            Array.Copy(fieldProductName.GetUniqueValues(), filter, filter.Length);
            fieldProductName.FilterValues.ValuesIncluded = filter;
        }
    }
}

Imports Microsoft.VisualBasic
Imports System.Data
Imports System.Data.OleDb
Imports System.Windows
Imports DevExpress.Xpf.PivotGrid
Imports HowToBindToMDB.NwindDataSetTableAdapters
Imports System

Namespace HowToBindToMDB
    ''' <summary> 
    ''' Interaction logic for MainWindow.xaml 
    ''' </summary> 
    Partial Public Class MainWindow
        Inherits Window
        Private salesPersonDataTable As New NwindDataSet.SalesPersonDataTable()
        Private salesPersonDataAdapter As New SalesPersonTableAdapter()

        Public Sub New()
            InitializeComponent()
            pivotGridControl1.DataSource = salesPersonDataTable
        End Sub 

        Private Sub Window_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
            salesPersonDataAdapter.Fill(salesPersonDataTable)
            Dim filter(14) As Object 
            Array.Copy(fieldProductName.GetUniqueValues(), filter, filter.Length)
            fieldProductName.FilterValues.ValuesIncluded = filter
        End Sub 
    End Class 
End Namespace