Pay for Payment for WooCommerce by kybernaut.cz
Plugin URL: https://kybernaut.cz/pluginy/woocommerce-pay-for-payment/
In file wp-content\plugins\woocommerce-pay-for-payment\inc\class-pay4pay.php add next code:
if (class_exists('WOOCS')) { global $WOOCS; $cost = $WOOCS->woocs_exchange_value(floatval($cost)); }