====== Improving Coupon Reports ======
Want to know how much was 'saved' by your customers by using a discount coupon? Here is a mod for v1.38 that will add it in the Admin coupon report. Enjoy :)

in **admin/coupon_admin.php** change lines 455+ to the following, adding the two statements marked "START MOD" and "END MOD"

<code php>
<?php
    $heading = array();
    $contents = array();
      $coupon_desc = $db->Execute("select coupon_name
                                   from " . TABLE_COUPONS_DESCRIPTION . "
                                   where coupon_id = '" . $_GET['cid'] . "'
                                   and language_id = '" . $_SESSION['languages_id'] . "'");
      $count_customers = $db->Execute("select * from " . TABLE_COUPON_REDEEM_TRACK . "
                                       where coupon_id = '" . $_GET['cid'] . "'
                                       and customer_id = '" . $cInfo->customer_id . "'");
// START MOD
      $coupon_saved = $db->Execute("SELECT sum(value) as saved FROM " . TABLE_COUPON_REDEEM_TRACK . ", " . TABLE_ORDERS_TOTAL . " WHERE coupon_id = " . $_GET['cid'] . " AND orders_id = order_id AND class = 'ot_coupon'");
// END MOD
      $heading[] = array('text' => '<b>[' . $_GET['cid'] . ']' . COUPON_NAME . ' ' . $coupon_desc->fields['coupon_name'] . '</b>');
      $contents[] = array('text' => '<b>' . TEXT_REDEMPTIONS . '</b>');
//      $contents[] = array('text' => TEXT_REDEMPTIONS_TOTAL . '=' . $cc_list->RecordCount());
      $contents[] = array('text' => TEXT_REDEMPTIONS_TOTAL . '=' . $cc_query_numrows);
      $contents[] = array('text' => TEXT_REDEMPTIONS_CUSTOMER . '=' . $count_customers->RecordCount());
// START MOD
      $contents[] = array('text' => TEXT_REDEMPTIONS_SAVED . '=' . $coupon_saved->fields['saved']);
// END MOD
      $contents[] = array('text' => '');
?>
</code>