php - How to add formula which is sum of $Quantity and display at the bottom? How to auto numbered list when data is fetched? -

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mysql_select_db("fyp",$connect); $sql="select * `table 1` year='$year'";  //query database $query=mysql_query($sql,$connect);      while($hdata=mysql_fetch_array($query))     {          $country=$hdata['country'];         $method=$hdata['method'];         $type=$hdata['type'];         $pline=$hdata['pline'];         $ptype=$hdata['ptype'];         $year=$hdata['year'];         $quarter=$hdata['quarter'];         $revenue=$hdata['revenue'];         $quantity=$hdata['quantity'];          echo "<tr>";             echo "<td align='middle'>$country</td>";             echo "<td align='middle'>$method</td>";             echo "<td align='middle'>$type</td>";             echo "<td align='middle'>$pline</td>";             echo "<td align='middle'>$ptype</td>";             echo "<td align='middle'>$year</td>";             echo "<td align='middle'>$quarter</td>";             echo "<td align='middle'>$revenue</td>";             echo "<td align='middle'>$quantity</td>";         echo "</tr>";     }  ?> 

$query=mysql_query($sql,$connect); $sum_quantity = 0; $i = 1; while($hdata=mysql_fetch_array($query)) {      $country=$hdata['country'];     $method=$hdata['method'];     $type=$hdata['type'];     $pline=$hdata['pline'];     $ptype=$hdata['ptype'];     $year=$hdata['year'];     $quarter=$hdata['quarter'];     $revenue=$hdata['revenue'];     $quantity=$hdata['quantity'];     $sum_quantity += $quantity;     echo "<tr>";         echo "<td align='middle'>$i</td>";         echo "<td align='middle'>$country</td>";         echo "<td align='middle'>$method</td>";         echo "<td align='middle'>$type</td>";         echo "<td align='middle'>$pline</td>";         echo "<td align='middle'>$ptype</td>";         echo "<td align='middle'>$year</td>";         echo "<td align='middle'>$quarter</td>";         echo "<td align='middle'>$revenue</td>";         echo "<td align='middle'>$quantity</td>";     echo "</tr>";      $i++; }

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