当价格超过500时，价格/ 1000 * 38不显示

Below is the code I have, it should take the price of a product then divide by 1000 then times by 38 to get and print the lease_price for products over £500. However, all it does it print NA, even when the product is over £500 it still shows NA. I don't know what is wrong with this? As far as I know this should work.

<p> <i class="fa fa-chevron-down"></i> <b>Lease To Buy Price:</b>
<span>
<?php 
  $tempPrice = str_replace(',',"", $price); //gets rid of "," 
  $tempPrice = substr($tempPrice,1); //removes currency from the front
  $tempPrice = floatval($tempPrice); //converts to double from string
  if($special > 0) 
  { 
    $lease_price = (($special/1000)*38);  
  } 
  else 
  { 
    $lease_price = (($tempPrice/1000)*38); 
  }  
  $lease_price = $this->currency->format($lease_price);
  if($tempPrice > 500) 
  {
    echo $lease_price;
  }
  else 
  {
    echo 'NA';
  }
?>
</span></p>

<?php 
  $tempPrice = str_replace(',',"", $price); //gets rid of "," 
  $tempPrice = substr($tempPrice,2); //removes currency from the front
  $tempPrice = floatval($tempPrice); //converts to double from string

  if($tempPrice > 500) 
  {
    echo $tempPrice*0.038;
  }
  else 
  {
    echo 'NA';
  }
 ?>