Display custom field 'Profit' in sales report - Woocommerce - wordpress

Question

I have been searching for 2 days how to do this and really struggling. I am fairly new to PHP so this maybe really simple, but whatever I try it just doesnt work.
I have a custom field in each product called 'Profit'. All i want to do is call that next to the name of the product in the woocommerce sales Report Email plugin. !
Here is the code from the class-wc-sre-row-top-sellers.php file I need to edit.
But it doesnt work, where am I going wrong?
UPDATE: I have now added what was suggested by still no luck. You can see the line I added '// Set Profit by Oli and added the
. ' - £) . $Profit
at the end of the $value = at the bottom.
UPDATE2: I have now added the code as I was kindly told below but it is still not working. The profit is being called but nothing is displayed after. The way I have entered the Custom Field is on the products under the Custom Fields tab
What am I doing wrong?
<?php
if ( !defined( 'ABSPATH' ) ) {
exit;
} // Exit if accessed directly
class WC_SRE_Row_Top_Sellers extends WC_SRE_Report_Row {
/**
* The constructor
*
* #param $date_range
*
* #access public
* #since 1.0.0
*/
public function __construct( $date_range ) {
parent::__construct( $date_range, 'top-sellers', __( 'Top Sellers', 'woocommerce-sales-report-email' ) );
}
/**
* Prepare the data
*
* #access public
* #since 1.0.0
*/
public function prepare() {
// Create a Report Manager object
$report_manager = new WC_SRE_Report_Manager( $this->get_date_range() );
// Set the default order types
$order_types = array( 'shop_order' );
// wc_get_order_types() is a 2.2+ function
if ( function_exists( 'wc_get_order_types' ) ) {
$order_types = wc_get_order_types( 'order-count' );
}
// Get top sellers
$top_sellers = $report_manager->get_order_report_data( array(
'data' => array(
'_product_id' => array(
'type' => 'order_item_meta',
'order_item_type' => 'line_item',
'function' => '',
'name' => 'product_id'
),
'_qty' => array(
'type' => 'order_item_meta',
'order_item_type' => 'line_item',
'function' => 'SUM',
'name' => 'order_item_qty'
)
),
'order_by' => 'order_item_qty DESC',
'group_by' => 'product_id',
'limit' => 12,
'query_type' => 'get_results',
'filter_range' => true,
'order_types' => $order_types,
) );
$value = 'n/a';
// Fill the $value var with products
if ( count( $top_sellers ) > 0 ) {
$value = '';
foreach ( $top_sellers as $product ) {
// THIS IS WHERE THE NEW CODE IS AND $PROFIT IS CALLED AFTER ' - £' . BELOW
$Profit = array_shift(woocommerce_get_product_terms($product->product_id, 'Profit', 'names'));
$value .= $product->order_item_qty . 'x : ' . get_the_title( $product->product_id ) . ' - £' . $Profit . '<br/>';
}
}
$this->set_value( $value );
}
}

Answer 1

Here is the way to get the custom variable added to woo commerce products:
$Profit = array_shift(woocommerce_get_product_terms($product->product_id, 'Profit', 'names'));