help with php

[kirkwebsites]

the below code has worked for months but in modifying I got lost. below is the error message and code. I could use some help

 

Parse error: syntax error, unexpected 'calculate_paid' (T_STRING), expecting ',' or ';' in C:\xampp\htdocs\invoice\payment.php on line 63

 
<?php
mysql_connect('localhost','root',''); 
mysql_select_db('numbersdb') or die("Unable to select invcalc database");
$query = "SELECT taxrate from numbdata"; 
$result = mysql_fetch_assoc(mysql_query($query));

$taxrate = $result['taxrate'];  
mysql_connect('localhost','root','');
mysql_select_db('oodb') or die("Unable to select database");
$query = "SELECT id, shipamt, duedate, charges, dayslate, tax, amtdue FROM oocust  WHERE DATEDIFF(NOW(), duedate) > 30 AND amtdue > '0.00'";  
$result=mysql_query($query);
$num=mysql_numrows($result);
while($row = mysql_fetch_array($result))
  {
$id = $row['id'];
$shipamt = $row['shipamt'];  
$duedate = $row['duedate'];
$charges = $row['charges'];
$dayslate = $row['dayslate'];
$tax = $row['taxrate']; 
$amtdue = $row['amtdue'];	 
$tax = $charges * $rate;	
$amtdue = $charges + $tax + $shipamt;
$currdate = date('Y-m-d');
$date1 = $duedate;
$date2 = $currdate;
$diff = abs(strtotime($date2) - strtotime($date1));
$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));
// echo "Difference is $months months, $days days.";
$dayslate = $months *30;
$dayslate = $dayslate + $days;
$sql = "UPDATE oocust SET
tax = '" . mysql_real_escape_string($tax) . "',
amtdue = '" . mysql_real_escape_string($amtdue) . "',
dayslate = '" . mysql_real_escape_string($dayslate) . "',
duedate = '" . mysql_real_escape_string($duedate) . "',
WHERE id='".$id."'";
mysql_query($sql) or die("Update query failed.");
}
echo "Invoice Prep completed";
mysql_close();
?>

[Jessica]

Post line 62-64.

[Barand]

I counted 44 lines in that code so please post the message that goes with the code.