แก้โค๊ส วอนผู้รู้ช่วยแก้ไขโค๊สให้หน่อย เกี่ยวกับการแสดงผล ของ Array

<form method="post" action="">
<?php
$product=array("CPU","Mainboard","Harddisk","Ram","Case","Monitor","Power Supply");
$price=array("4500","2800","1800","1200","1500","6700","800");	
?>


<table border=1>
<tr>
	<th width=50>No</th>
	<th width=150>Product</th>
	<th width=80>Price</th>
	<th width=80>Order</th>
	<th width=100>Sub Total</th>
</tr>


<?php
for($n=0;$n<count($product);$n++)
{
echo"
	<tr>
		<td align=center>",$n+1,"</td>
		<td>",$product[$n],"</td>
		<td align=right>",$price[$n],"</td>
		<td align=center>
		<select name='order[]'>";
		for($i=0;$i<=5;$i++)
			echo"<option value='$i'>$i</option>";
?>
		<td>
<?php
		$order=$_POST["order"];
		for($i=0;$i<count($price);$i++)
			if($order>0)
				{
					$total=$price[$i]*$order[$i];
					echo "$total<br>";
				}
}
?>
</td>
<tr>
</select>
</table>
<br>
<input type="submit" value="OK">
</form>