RadGridView - Grid with 2 or more Footers

[James]

I currently have a function grid similar to:

<telerik:RadGridView Grid.Row="2" Grid.ColumnSpan="2" x:Name="MyGridView"
                     ItemsSource="{Binding MyItems}"
                     RowIndicatorVisibility="Collapsed"
                     ShowColumnFooters="True"
                     ShowGroupPanel="False"
                     IsReadOnly="True"
                     HorizontalContentAlignment="Stretch"
                     VerticalAlignment="Top">
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding MonthDisplay}" Header="Month" Width="65">
            <telerik:GridViewDataColumn.Footer>
                <TextBlock Text="Totals:"/>
            </telerik:GridViewDataColumn.Footer>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column1Data}" Header="Column 1" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column2Data}" Header="Column 2" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column3Data}" Header="Column 3" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Column4Data}" Header="Column 4" Width="*" MinWidth="40" MaxWidth="95" DataFormatString="#,###0.##" TextAlignment="Right" FooterTextAlignment="Right">
            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:SumFunction/>
            </telerik:GridViewDataColumn.AggregateFunctions>
        </telerik:GridViewDataColumn>
    </telerik:RadGridView.Columns>
</telerik:RadGridView>

So the grid would show results like:

Month	Column1	Column2	Column3	Column4
Jan	1	2	3	4
Feb	1	2	3	4
March	1	2	3	4
Totals:	3	6	9	12

What I now want to do is add another footer row so that the grid would look like:

Month	Column1	Column2	Column3	Column4
Jan	1	2	3	4
Feb	1	2	3	4
March	1	2	3	4
Totals:	3	6	9	12
Average:1	2	3	4

Is it possible to add a 2nd footer row and  if so how can I accomplish that?