El codigo con problemas es este...
$sql_productos = "SELECT p.quantity, pr.price, pl.name FROM lqd_cart_product as p, lqd_product_lang as pl, lqd_product as pr where p.id_cart='$TBK_ORDEN_COMPRA' and p.id_product=pl.id_product and p.id_product=pr.id_product and pl.id_lang=5 order by p.id_cart";
$result_pfinales = mysql_query($sql_productos, $conexion);
$z=0;
while($myrow_not = mysql_fetch_array($result_pfinales))
{
$z++;
echo "<table width='550px' align='center'> ";
echo "<th width='200px' align='left'>";
print utf8_encode($t_producto=$myrow_not[name]);
echo "</th>";
echo "<th width='73px' align='left'>";
print round($t_producto=$myrow_not[quantity]);
echo "</th>";
echo "<th width='85px' align='left'>";
print '$'; print' '; print number_format($t_producto=$myrow_not[price],0,',','.');
echo "</th>";
echo "</th>";
echo "<th width='385px' align='left'>";
print '$'; print' '; print round(($t_producto=$myrow_not[price])*$t_producto=$myrow_not[quantity]);
echo "</th>";
echo "</table>";