How to display sub total in text box when item and total price add in row?

How to display sub total in text box when item and total price add in row?

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title> </title>
<link href="css/bootstrap-4.0.0.css" rel="stylesheet" type="text/css">
<link href="css/styles.css" rel="stylesheet" type="text/css">
    
   
<script>
$(document).ready(function() {
var id = 1; 

$("#butsend").click(function() {
var newid = id++; 
$("#table1").append('<tr valign="top" id="'+newid+'">\n\
<td width="100px" >' + newid + '</td>\n\
<td width="100px" class="patid'+newid+'">' + $("#patid").val() + '</td>\n\
<td width="100px" class="test_code'+newid+'">' + $("#test_code").val() + '</td>\n\
<td width="100px" class="test_name'+newid+'">' + $("#test_name").val() + '</td>\n\
<td width="100px" id="generalprice" class="generalprice'+newid+'">' + $("#generalprice").val() + '</td>\n\
<td width="100px" id=quantity class="quantity'+newid+'">' + $("#quantity").val() + '</td>\n\
<td width="100px" id="qntytolprices" class="totalprices'+newid+'">' + $("#totalprices").val() + '</td>\n\
<td width="100px"><a href="javascript:void(0);" class="remCF">Remove</a></td>\n\ </tr>');
});
$("#table1").on('click', '.remCF', function() {
$(this).parent().parent().remove();
$('#table1 tbody tr').each(function(id){            
        $($(this).find('td')[0]).html(id++);          
    });
});
$("#butsave").click(function() {
var lastRowId = $('#table1 tr:last').attr("id"); 
var test_code = new Array(); 
var test_name = new Array();
var generalprice = new Array();
var quantity = new Array();

var totalprices = new Array();
var patid = new Array();
for ( var i = 1; i <= lastRowId; i++) {
patid.push($("#"+i+" .patid"+i).html()); 
test_code.push($("#"+i+" .test_code"+i).html()); 
test_name.push($("#"+i+" .test_name"+i).html()); 
generalprice.push($("#"+i+" .generalprice"+i).html()); 
quantity.push($("#"+i+" .quantity"+i).html()); 
totalprices.push($("#"+i+" .totalprices"+i).html()); 
totalprice.push($("#"+i+" .totalprice"+i).html()); 
}

});
});
</script>
<script>
$(".qtol2,.qtol1").keyup(function() {

  $('.qtol3').val($('.qtol1').val() * $('.qtol2').val());

});
</script>
</head>
<body>
<div class="form-group">
    <form>
<input name="patid" type="text" id="patid" placeholder="patid" value="">
<div class="container" id="multiple">
<input name="test_code" type="text" id="test_code" placeholder="code" value="">
        <input name="test_name" type="text" id="test_name" placeholder="Item Name" value="">
        <input class="qtol1"  name="generalprice" type="text" id="generalprice" placeholder="general price">
<input  class="qtol2" name="quantity" type="text" id="quantity" value="1" onClick="calc()" placeholder="quantity">
<input class="qtol3" name="totalprices" type="text" id="totalprices" placeholder="total prices">
<input name="send" type="button" id="butsend"  class="add-row" value="Add Row">
</div>
<div>
<input name="save" type="button"  class="btn btn-primary" value="Save to database" id="butsave">
</div>
   
    <table id="table1" name="table1" class="table table-bordered">
<tbody>
<thead>
<tr>
<th>Serial no.</th>
<th>ID</th>
<th>Test code</th>
<th>Test name</th>
<th>General price</th>
<th>Quantity</th>
<th>Total prices</th>
<th>Action</th>
</tr>
</thead>
</tbody>

<tfoot>
            <tr>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
                <td></td>
<td>Total:</td>
                <td ><input id="subtotal" type="text"></td>
                
                <td>
                    
                </td>
            </tr>
        </tfoot>
</table>
</form>
</div>
    
</body>
</html>