ASP.Net MVC: Calculate TextBox Total based on form Inputs using jQuery

Real Time JavaScript Calculation for sum value based on Form Inputs.

I have table for sum value, also this table is to add dynamic row. It is not working when I start to run code for total value. I think it logically work but I have no idea please help me.

Please help me my problem.

Total: <span id="total"></span>
<tr id="tablerow0">
    <td>
        @Html.TextBoxFor(modelItem => modelItem.store_Invs[0].Scis_sold, new { @style = "height:30px; ,id = "scissold" })
     </td>
</tr>
<button id="add" type="submit" class="btn btn-primary">Add</button>

<script type="text/javascript">
    var counter = 1;
    $(function () {
 
        $('#add').click(function () {
            var selected = [];
            $('[id*=Gif] option:selected').each(function () {
                selected.push($(this).val());
            });
            $('<tr id="tablerow' + counter + '"><td>' +
                 
                '<td>' +
                '<input id="scissold" type="text" name="store_Invs[' + counter + '].Scis_sold" style="height:30px;" value="" required="required" />'  +
                '</td>' +
                '<button type="button" class="btn btn-primary" onclick="removeTr(' + counter + ');">Delete</button>' +
                '</td>' +
                '</tr>').appendTo('#submissionTable');                  
 
            $('#Gif' + counter + ' option').each(function () {
                var item = $(this).val();
                if (selected.indexOf(item) > -1) {
                    $(this).remove();
                }
            });               
 
            $("#Gif" + counter).chosen();
            counter++;              
 
            return false;
        });
 
       var total = 0;
       $('input').keyup(function () { // run anytime the value changes
           var firstValue = Number($("scissold" + counter +).val());   // get value of field
           total += firstValue;
           $('#total').html(total); // add them and output it
       });
    });