mysql query

Dear List -

I can't figure this out....

mysql> describe Inventory;
+-------------+-------------+------+-----+---------+-------+
| Field       | Type        | Null | Key | Default | Extra |
+-------------+-------------+------+-----+---------+-------+
| UPC         | varchar(14) | YES  |     | NULL |       |
| quant       | int(5)      | NO   |     | NULL |       |
| manuf       | varchar(20) | YES  |     | NULL |       |
| item        | varchar(50) | YES  |     | NULL |       |
| orderpt     | tinyint(4)  | NO   |     | NULL |       |
| ordrpt_flag | tinyint(3)  | YES  |     | NULL |       |
| stock       | int(3)      | YES  |     | NULL |       |
+-------------+-------------+------+-----+---------+-------+

Here are code snippets -

                           $upc   = $_SESSION['UPC'];
                           $qnt   = $_POST['quant'];
                           $mnf   = $_POST['manuf'];
                           $itm   = $_POST['item'];
                           $odrpt = $_POST['oderpt'];
                           $opf   = $_POST['ordrpt_flag'];
                           $stk    = $_POST['stock'];

                           $sql2 = "insert into Inventory (UPC, quant, 
manuf, item, orderpt, ordrpt_flag, stock)"
                                 ."values ('$upc', $qnt,'$mnf','$itm', 
odrpt, 0, $stk)";
                           $result2 = mysqli_query(cxn, $sql2);
                           echo '$sql2<br />';
                           print_r($sql2);
                           echo "<br />$upc $qnt $mnf $itm $odrpt $opf 
$stk<kbr />";
                           if (!$result2)
                                 die('Could not enter data: ' . 
mysqli_error());

The mysql query fails.  I cannot figure out why.  It works from the 
command line.

TIA

Ethan