$KGp = 20000;
$KGs = 15000;
$BtKGp = 10000;
$BtKGs = 5000;
$BB = 3;
$total = $KGp + $BtKGp;
$sisa = $BB - 1;
if($sisa > 0){
$total += ($sisa * $KGs);
$total += ($sisa * $BtKGs);
}
echo $total;

-- Database: `ongkir`
--
 
-- --------------------------------------------------------
 
--
-- Table structure for table `daftarkota`
--
 
CREATE TABLE IF NOT EXISTS `daftarkota` (
`id` INT(11) NOT NULL,
`kodekota` VARCHAR(10) NOT NULL,
`namakota` VARCHAR(10) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 
--
-- Dumping data for table `daftarkota`
--
 
INSERT INTO `daftarkota` VALUES (1, 'kota1', 'belawan'),(2, 'kota2', 'binjai');
 
-- --------------------------------------------------------
 
--
-- Table structure for table `service_cepat`
--
 
CREATE TABLE IF NOT EXISTS `service_cepat` (
`id` INT(11) NOT NULL,
`namakota` VARCHAR(10) NOT NULL,
`KGpCPT` VARCHAR(10) NOT NULL,
`KGsCPT` VARCHAR(10) NOT NULL,
`BtKGpCPT` VARCHAR(10) NOT NULL,
`BtKGsCPT` VARCHAR(10) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 
--
-- Dumping data for table `service_cepat`
--
 
INSERT INTO `service_cepat` VALUES
(1, 'Belawan', '40000', '30000', '20000', '10000'),
(2, 'Binjai', '50000', '40000', '30000', '20000');
 
-- --------------------------------------------------------
 
--
-- Table structure for table `service_standar`
--
 
CREATE TABLE IF NOT EXISTS `service_standar` (
`id` INT(11) NOT NULL,
`namakota` VARCHAR(10) NOT NULL,
`KGpSTD` VARCHAR(10) NOT NULL,
`KGsSTD` VARCHAR(10) NOT NULL,
`BtKGpSTD` VARCHAR(10) NOT NULL,
`BtKGsSTD` VARCHAR(10) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 
--
-- Dumping data for table `service_standar`
--
 
INSERT INTO `service_standar` VALUES
(1, 'Belawan', '20000', '15000', '10000', '5000'),
(2, 'Binjai', '25000', '20000', '15000', '10000');

 <?PHP
    if(isset($_POST['cek'])){
    $conn = mysql_connect("localhost", "root", "");
    mysql_select_db("ongkir");

$Kota = $_POST['namakota'];	
    $KGp = $_POST['KGpCPT'.'KGpSTD'];
    $KGs = $_POST['KGsCPT'.'KGsSTD'];
    $BtKGp = $_POST['BtKGpCPT'.'BtKGpSTD'];
    $BtKGs = $_POST['BtKGpCPT'.'BtKGpSTD'];
    $BB = $_POST['berat'];
    $total = $_POST['tarifcepat','tarifstandar']

    $sql = "select * from daftarkota, service_cepat, service_standar where namakota, KGpCPT, KGsCPT,BtKGpCPT,BtKGsCPT, KGpSTD, KGsSTD,BtKGpSTD,BtKGsSTD like '%$total%' or namakota, KGpCPT, KGsCPT,BtKGpCPT,BtKGsCPT, KGpSTD, KGsSTD,BtKGpSTD,BtKGsSTD like '%$total%'";
    $result = mysql_query($sql);
    if(mysql_num_rows($result) > 0);
    while($tujuan = mysql_fetch_array($result));
          
    $total = $KGp + $BtKGp;
    $sisa = $BB - 1;
    if($sisa > 0){
    $total += ($sisa * $KGs);
    $total += ($sisa * $BtKGs);
    }
    }?> 

 <form action="" method="post">
 <table width="100%" border="0">
  <tr>
    <td>Tujuan</td>
    <td><input type="text" name="namakota" id="namakota"/></td>
  </tr>
  <tr>
    <td>BeratKiriman</td>
    <td><input type="text" name="berat" id="berat"/></td>
  </tr><tr>
    <td>&nbsp;</td>
    <td><input type="submit" value="cek" name="search"/></td>
  </tr>
</table>
</form><?php
    while($tujuan = mysql_fetch_array($result)){?>
    <table align="center">
    <tr>
    <td>Tujuan</td>
    <td><?php echo $tujuan['namakota'];?></td>
    </tr>
    <tr>
    <td>Service Cepat</td>
    <td ><?php echo $total['Tarifcepat'];?></td>
    </tr>
    <tr>
    <td>Service Standar</td>
    <td ><?php echo $total['Tarifstandar'];?></td>
    </tr>
    </tr>