Here is the code for aspx declaration

<DisplayLayout AllowDeleteDefault="Yes" ColWidthDefault="" MergeStyles="False" AutoGenerateColumns="False"

AllowAddNewDefault="Yes" RowHeightDefault="20px" Version="4.00" ViewType="Hierarchical" ScrollBar="Never"

IndentationDefault="16" RowSelectorsDefault="No" Name="grd" CellClickActionDefault="Edit"

AllowUpdateDefault="Yes">

<ClientSideEvents BeforeEnterEditModeHandler="onBeforeEnterEditMode" AfterRowUpdateHandler="onRowChange"></ClientSideEvents>

<Pager>

</Pager>

<HeaderStyleDefault CssClass="header"></HeaderStyleDefault>

<FrameStyle Width="760px" CssClass="datagrid"></FrameStyle>

<SelectedHeaderStyleDefault CssClass="selected"></SelectedHeaderStyleDefault>

<EditCellStyleDefault BorderWidth="0px" BorderStyle="None"></EditCellStyleDefault>

<RowAlternateStyleDefault CssClass="alternate"></RowAlternateStyleDefault>

<RowStyleDefault CssClass="normal"></RowStyleDefault>

</DisplayLayout>

<Bands>

<igtbl:UltraGridBand AddButtonCaption="Total1" AllowUpdate="Yes" AllowAdd="Yes" SelectTypeRow="Single"

Key="SubTotals" CellClickAction="Edit" DataKeyField="Id">

<Columns>

<igtbl:UltraGridColumn HeaderText="Group" Key="Type" IsBound="True" Width="200px" BaseColumnName="TypeName"

AllowUpdate="Yes">

<Footer Key="Type"></Footer>

<Header Key="Type" Caption="Group"></Header>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn HeaderText="Test1" Key="TestValue" FieldLen="30" IsBound="True" Width="80px"

Format="#.00E+00" BaseColumnName="Value">

<Footer Key="TestValue"></Footer>

<Header Key="TestValue" Caption="Test1"></Header>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn HeaderText="Test2" Key="TestValue1" FieldLen="30" IsBound="True" Width="80px" Format="#.00E+00"

BaseColumnName="TestValue">

<Footer Key="TestValue1"></Footer>

<Header Key="TestValue1" Caption="Test2"></Header>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn Key="AddActivity" Width="80px" Type="Button" BaseColumnName="" NullText="Add New Record">

<CellButtonStyle CssClass="button"></CellButtonStyle>

<CellStyle CssClass="button"></CellStyle>

<Footer Key="AddActivity"></Footer>

<Header Key="AddActivity"></Header>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn Key="Delete" Width="80px" Type="Button" BaseColumnName="" NullText="Delete Group">

<CellButtonStyle CssClass="button"></CellButtonStyle>

<CellStyle CssClass="button"></CellStyle>

<Footer Key="Delete"></Footer>

<Header Key="Delete"></Header>

</igtbl:UltraGridColumn>

</Columns>

</igtbl:UltraGridBand>

<igtbl:UltraGridBand AddButtonCaption="Activities" AllowUpdate="Yes" AllowAdd="Yes" SelectTypeRow="Single"

Key="Activities" CellClickAction="Edit" AllowDelete="Yes" DataKeyField="Id">

<Columns>

<igtbl:UltraGridColumn HeaderText="Test1" Key="Test3" IsBound="True" Width="200px" BaseColumnName="Name1"

AllowUpdate="Yes">

<Footer Key="Test3"></Footer>

<Header Key="Test3" Caption="Test1"></Header>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn HeaderText="Test4" Key="ActivityValue" FieldLen="30" IsBound="True" Width="80px"

Format="#.00E+00" BaseColumnName="Value">

<Footer Key="ActivityValue"></Footer>

<Header Key="ActivityValue" Caption="Test4"></Header>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn Key="DeleteActivity" Width="160px" Type="Button" BaseColumnName="" NullText="Delete Record">

<CellButtonStyle CssClass="button"></CellButtonStyle>

<CellStyle CssClass="button"></CellStyle>

<Footer Key="DeleteActivity"></Footer>

<Header Key="DeleteActivity"></Header>

</igtbl:UltraGridColumn>

</Columns>

</igtbl:UltraGridBand>

</Bands>

</igtbl:ultrawebgrid>

Please check this declaration and let me know whether we have to set some properties of grid which in turn can add calculated row in the grid , which will be calculated from the value of some column in the grid.