private function setup_total()
{
$amount = $this->get_meta('_give_payment_total', true);
if (empty($amount) && '0.00' != $amount) {
$meta = $this->get_meta('_give_payment_meta', true);
$meta = maybe_unserialize($meta);
if (isset($meta['amount'])) {
$amount = $meta['amount'];
}
}
return $amount;
}