สอบถามเรื่อง การ บวกเลขแล้ว update ลงฐานข้อมูล ใน code เดียวกัน

$price = $_POST["price"];
$name = $_POST["name"];
$type = $_POST["type"];
$fes = $_POST["fes"];
$a[0]='1200'; 	 $b[0]='900'; 
$a[1]='1400';	 $b[1]='1100'; 
$a[2]='1500';	 $b[2]='1300'; 
$a[3]='2500';	 $b[3]='2200'; 
$a[4]='400';	 $b[4]='400'; 

$c=300;
if($_POST["type"]=='1'){
	foreach($a as $key=>$value)
	foreach($name as $key=>$value2)
	$type1 = mysql_query("UPDATE rate SET 
	price='$a[$key]' WHERE name='$name[$key]'");
}
	
elseif($_POST["type"]=='2'){
	foreach($b as $key=>$value)
	foreach($name as $key=>$value2)
	$type2 = mysql_query("UPDATE rate SET 
	price='$b[$key]' WHERE name='$name[$key]'");
}

else

foreach($price as $key=>$value){
	foreach($name as $key=>$value2)
$upd_price = mysql_query("UPDATE rate SET price='$price[$key]' WHERE name='$name[$key]'");
}

if($fes=='3')
	foreach($price as $key=>$value){
	foreach($name as $key=>$value2)
$upd_price2 = mysql_query("UPDATE rate SET price='$price[$key]+$c' WHERE name='$name[$key]'");
}
header("Location:edit_price.php");