Prestashop 1.6 - Get Refund Value based on Selection in Order Page

[PrestashopEnthu]

I am looking for a solution to retrieve/grab refund values in order page. I am creating an automatic refund with this value.

Currently, I am not able to grab the price as it is returning 0.

$order_detail = new OrderDetail((int) $params['id_order_detail']);
$products = $this->context->cart->getProducts(true);
$cancel_quantity = Tools::getValue('cancelQuantity');

$amount = (float) ($products[(int) $order_detail->id]['product_price_wt'] * (int) $cancel_quantity[(int) $order_detail->id]);

After clicking on the checkbox, I will pass the value to refund in another process.

Can anybody advise how can I pass the values based on checkboxes selected?

Any help is greatly appreciated. Thank you.

[PrestashopEnthu]

Anyone?