Hi,
That's not as easy to change.
This will require modifying the code:
$diff = $method->payment_price_with_tax - $this->order->order_payment_price;
$sign = '';
if($diff > 0)
$sign = '+';
$this->methods[$this->type][(string)@$this->order->order_id][$k]->payment_name .= ' ('.$sign.$currencyClass->format($diff, $this->order->order_currency_id).')';
in the file administrator/components/com_hikashop/types/plugins.php
This is a core file of HikaShop, so you will lose your changes each time you update HikaShop.
To avoid that, you would have to override the whole class with the development of a system plugin:
www.hikashop.com/support/documentation/6...ntation.html#classes