[Solved] Multiply two columns in ASP.Net GridView using jQuery

I am stuck and many times get stuck, when i try myself to multiply GridView column value to display in Third Column, it is not getting done 

Please guide me, i tried below reference but not done

I want to multiply qty * Rate=Total

JS

<script type="text/javascript">
    $(function () {
        $("[id*=orderqty]").val("0");
    });
    $("body").on("change keyup", "[id*=orderqty]", function () {
        //Check whether Quantity value is valid Float number.
        var rate = parseFloat($.trim($(this).val()));
        if (isNaN(rate)) {
            rate = 0;
        }
 
        //Update the Quantity TextBox.
        $(this).val(rate);
 
        //Calculate and update Row Total.
        var row = $(this).closest("tr");
        $("[id*=lbtotal]", row).html(parseFloat($("td", row).eq(4).html()) * parseFloat($(this).val()));
 
        //Calculate and update Grand Total.
        var grandTotal = 0;
        $("[id*=lbtotal]").each(function () {
            grandTotal = grandTotal + parseFloat($(this).html());
        });
        $("[id*=lblGrandTotal]").html(grandTotal.toString());
    });
</script>

<asp:GridView ID="GVSO" runat="server" AutoGenerateColumns="false" CssClass="mygrdContent" HeaderStyle-BackColor="#66ccff"
    HeaderStyle-CssClass="header" HeaderStyle-ForeColor="White"  PagerStyle-CssClass="pager"
    RowStyle-CssClass="rows" style="font-size: small" Width="357px">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:CheckBox ID="CheckBox1" runat="server"  onclick="Check_Click(this)" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Codeitem" Visible="true">
            <ItemTemplate>
                 <asp:HiddenField ID="hfBID" runat="server" Value='<%#Eval("Codeitem")%>' />
                <asp:Label ID="Codeitem" runat="server" Text='<%#Bind("Codeitem")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Description">
            <ItemTemplate>
                <asp:Label ID="Descriptionitem" Width="250px" runat="server" Text='<%#Bind("Descriptionitem")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>                        
        <asp:TemplateField HeaderText="Size">
            <ItemTemplate>
                <asp:Label ID="Size" runat="server" Text='<%#Bind("Size")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField ItemStyle-Width="150px" DataField="rate" HeaderText="Rate" />
        <asp:TemplateField HeaderText="QTY">
            <ItemTemplate>
                <asp:Textbox ID="orderqty" Width="50px"  runat="server" Text='<%#Bind("orderqty")%>'></asp:Textbox>
            </ItemTemplate>
        </asp:TemplateField>                           
        <asp:TemplateField HeaderText="Total">
            <ItemTemplate>
                <asp:label ID="lbtotal" Width="50px" runat="server" Text='<%#Eval("lbtotal")%>'></asp:label>
            </ItemTemplate>
        </asp:TemplateField>                      
    </Columns>
    <HeaderStyle BackColor="#66CCFF" ForeColor="White" />
    <SelectedRowStyle BackColor="Yellow" />
</asp:GridView>