Creating a calculated field in grid

[Venkatesh]

Hi,
I have 3 columns available as below:

<telerik:GridTemplateColumn DataField="OrderQuantity" HeaderText="Order Quantity" UniqueName="OrderQuantity" Visible="true">
                            <InsertItemTemplate>
                                 <telerik:RadTextBox ID="RadtxtOrderQuantity" runat="server" Text='<%# Bind("OrderQuantity") %>' >
                                </telerik:RadTextBox>
                            </InsertItemTemplate>
                            <EditItemTemplate>
                                <telerik:RadTextBox ID="RadtxtOrderQuantity" runat="server" Text='<%# Eval("OrderQuantity") %>' >
                                </telerik:RadTextBox>
                            </EditItemTemplate>
                        </telerik:GridTemplateColumn>



                        <telerik:GridTemplateColumn DataField="UnitPrice" HeaderText="Unit Price" UniqueName="UnitPrice" Visible="true">
                            <InsertItemTemplate>
                                 <telerik:RadTextBox ID="RadtxtUnitPrice" runat="server" Text='<%# Bind("UnitPrice") %>' >
                                </telerik:RadTextBox>
                            </InsertItemTemplate>
                            <EditItemTemplate>
                                <telerik:RadTextBox ID="RadtxtUnitPrice" runat="server" Text='<%# Eval("UnitPrice") %>' >
                                </telerik:RadTextBox>
                            </EditItemTemplate>
                        </telerik:GridTemplateColumn>


                        <telerik:GridNumericColumn DataField="FinalPrice" HeaderText="Final Price" UniqueName="FinalPrice">
                        </telerik:GridNumericColumn>

The FinalPrice column should be a calculated field(unitprice * order quantity) and be automatically populated. This calculation should be available in insert and update options.
How to achieve this?
Thanks

[Venkatesh]

HI,
Found that there is a calculated field template and used it.
Thanks