Logical operator

<form action='orderpplac.php' method='Post' class='shlistbar'>
    <table border='1'>
    <tr>
    <th>SHOP NAME</th>
    <th>PRODUCT NAME</th>
    <th>PRODUCT SIZE</th>
    <th>PRODUCT COLOUR</th>
    <th>PRODUCT QUANTITY</th>
    <th>PRICE</th>
    <th>TOTAL</th>
    <th></th>
    </tr>
<?php
    // Get DB results and loop, outputting table rows with counter
    $pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'") or die(mysql_error());
   for ($i = 0; $row = mysql_fetch_assoc($pplresult); $i++) {
    echo "
    <tr>
    <td>".htmlspecialchars($row['Sname'])."</td>
    <td>".htmlspecialchars($row['Pname'])."</td>
    <td>".htmlspecialchars($row['Psize'])."</td>
    <td>".htmlspecialchars($row['Pcolour'])."</td>
    <td>
    <input type='text' name='item[$i][Pquantity]' id='Pquantity' value='".htmlspecialchars($row['Pquantity'])."' />
    <input type='hidden' name='item[$i][Pidno]' id='Pidno' value='".htmlspecialchars($row['Pidno'])."' />
    </td>
    <td>
    <input type='text' name='item[$i][Price]' id='Pquantity' value='".htmlspecialchars($row['Price'])."' readonly>
    </td>
    <td>".htmlspecialchars($row['Tprice'])."</td>
    <td><a href='deleteproduct.php?del=".htmlspecialchars($row['Pidno'])."'>delete</a></td>
    </tr>";
    }
   $pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'") or die(mysql_error());
  while ($row = mysql_fetch_assoc($pplresult)) 
   //echo $row['Pquantity'] * $row['Price'];
  {
   $totalPrices += $row['Tprice'];
    if(0.1*$totalPrices <= 50 )
    {
    $totalPrice = (0.1*$totalPrices +  $totalPrices);
    }
    else
   {
    $totalPrice = 50 + $totalPrices;
        }
        
  }
  //echo "$totalprice";
  
         ?>
<tr>
                <th>Total Price</th>
                <th><?php echo $totalprice; ?></th>
                
            </tr>
    <!--Close table and form-->

    </table>
    <input type='submit' name='submit1' value='UPDATE' />
    <input type='submit' name='submit2' value='SUBMIT' />
    </form>

It’s nice you posted your code but what is your actual question?