I want to pass selected value on invoice.php file using jquery. After sending value on invoice.php file. I want to show invoice.php file echo result on index.php page selected input box. Like an example: If anyone select Item then rate show on rate input box. Here is my code and image

01.jpg

index.php file code:

HTML Code:
<html>
    <head>
        <title>Invoice</title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">

    $(document).ready(function(){
    $(".iteam").change(function(){
        calculate();
    });
});

function calculate() {
    
var iteam = [];
    $(".iteam").each(function() {
            var num=(this.value);
            iteam.push(num);
    });


    $('input[name=rate]').each(function(i){
        $.get(
            '/invoice_final_2.php',
            {'product':iteam[i]},
            function(data) {
                $(this).html(data);
            });
    });
}
</script>
<style type="text/css">
table
{
    border: 1px solid black;
    border-bottom: none;
    width: 300px;
}


td
{
    border-left: 1px solid black;
    border-bottom: 1px solid black;
    padding:5px 5px 5px 5px;
}
#first
{
    border-left: none;
    border-bottom: 1px solid black;
}
</style>
    </head>
    <body>
        <form method='post' name='form1' action='welcome.php'>
        <table cellpadding="0" cellspacing="0">
            <tr>
                <td id="first">Iteam</td>
                <td>Rate</td>
            </tr>
[PHP]            <?php
            $num=4;
            for ($i=0; $i<$num; $i++)
            {
                echo "
                 <tr>
                 <td id='first'>
                 <select class='iteam' name='iteam'>
                 <option>Select one</option>
                 <option>Deluxe Plan</option>
                 <option>Premium Plan</option>
                 <option>Standard Plan</option>
                 <option>Economy Plan</option>
                 </select>
                </td>
                <td><input class='rate' type='text' name='rate'/></td>
               </tr>";
            }
            ?>[/PHP]
     </table>
</form>
</body>
</html>
invoice.php file code:

PHP Code:
<?php
include "dbconnect.php";

$product=$_GET['product'];

$query="select * from iteam where iteam_name='$product'";
$result=mysql_query or die (mysql_error());
$row=mysql_fetch_assoc($result);
$rate=$row['rate'];

echo "$rate";

?>
I am trying so hard to solve this problem. But I can't find out the problem. So pls pls pls... help me.