How to count entries?

Hi,

I made a custom PDF template and I need to output receipt number, which should be a number of each entry.

This is the code example:

<?php
foreach ($lead_ids as $lead_id) {

  $lead       = RGFormsModel::get_lead($lead_id);
  $form_data  = GFPDFEntryDetail::lead_detail_grid_array($form, $lead);
  global $wpdb;
  $leadId   = $wpdb->get_row($wpdb->prepare( "
    SELECT COUNT(*) AS leadId
    FROM <code>&quot; . $wpdb->prefix . &quot;rg_lead</code>
    WHERE form_id=%d AND id <= %d", $form_data['form_id'], $form_data['entry_id']
  ), ARRAY_A);
  $receipt_out = $leadId['leadId'] + 80;
  PDF_Common::view_data($form_data);
  ?>

    <p>Receipt / Reçu: <?= sprintf("A%'.05d\n", $receipt_out) ?></p>
<?php } ?>

now the above code works fine, but it only counts to the number 5. If I have more then 5 entries then each next entry will have receipt number 5 while it should continue the counting 6,7,8,…

Can you help me with this?