Regular price not showing in emails

Hi,

I have a few products that are discounted. When I receive an order, my email only gives the price that is payed. So I do not know if the product had a discount or not. (I need this informatie to make a Invoice).

‘<?php
/**
* Admin new order email
*
* This template can be overridden by copying it to yourtheme/woocommerce/emails/admin-new-order.php.
*
* HOWEVER, on occasion WooCommerce will need to update template files and you (the theme developer).
* will need to copy the new files to your theme to maintain compatibility. We try to do this.
* as little as possible, but it does happen. When this occurs the version of the template file will.
* be bumped and the readme will list any important changes.
*
* @see http://docs.woothemes.com/document/template-structure/
* @author WooThemes
* @package WooCommerce/Templates/Emails/HTML
* @version 2.5.0
*/
if ( ! defined( ‘ABSPATH’ ) ) {
exit;
}

printf( __( ‘You have received an order from %s. The order is as follows:’, ‘woocommerce’ ), $order->get_formatted_billing_full_name() ); ?></p>

<?php

/**
* @hooked WC_Emails::order_details() Shows the order details table.
* @since 2.5.0
*/
do_action( ‘woocommerce_email_order_details’, $order, $sent_to_admin, $plain_text, $email );

/**
* @hooked WC_Emails::order_meta() Shows order meta data.
*/
do_action( ‘woocommerce_email_order_meta’, $order, $sent_to_admin, $plain_text, $email );

/**
* @hooked WC_Emails::customer_details() Shows customer details
* @hooked WC_Emails::email_address() Shows email address
*/
do_action( ‘woocommerce_email_customer_details’, $order, $sent_to_admin, $plain_text, $email );

/**
* @hooked WC_Emails::email_footer() Output the email footer
*/
do_action( ‘woocommerce_email_footer’, $email );
‘

Is my email template

https://wordpress.org/plugins/woocommerce/