Footer Aggregate result alignment

[Mia]

Hi, 

I have a footer with two aggregation results, and i want the number s to be right aligned.
like this:  19.65489564
6548 .

I have tried to set TextAlignment="Right" and  FooterTextAlignment="Right" but the result is left aligned.
like this:  19.65489564 6548

Any suggestions? 

Thanks in advance.

<telerik:RadGridView
    x:Name="RadGrid"
    ItemsSource="{Binding Contents}"
    AutoGenerateColumns="False"
    telerik:StyleManager.Theme="Office_Blue"
    RowIndicatorVisibility="Collapsed"
    Width="200"
    Height="300"
    ShowColumnFooters="true"
    ShowGroupPanel="False"
    >
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn
            DataMemberBinding="{Binding Number1}"
            Width=" 1*"
            TextAlignment="Right"
            FooterTextAlignment="Right"
            >
            <telerik:GridViewColumn.Header>
                <TextBlock Text="Numbers"/>
            </telerik:GridViewColumn.Header>

            <telerik:GridViewDataColumn.AggregateFunctions>
                <telerik:AverageFunction  SourceField="Number1"  />
                <telerik:SumFunction  SourceField="Number1" />
            </telerik:GridViewDataColumn.AggregateFunctions>

        </telerik:GridViewDataColumn>
    </telerik:RadGridView.Columns>
</telerik:RadGridView>