Hi,
I solved the problem, but had to change the code more. For anybody who is interested in having the order price without handling and shipping fee shown, here is the working part to modify in the show_products.php file starting at line 212.
?></td>
<td class="hikashop_order_item_quantity_value"><?php echo $product->order_product_quantity;?></td>
<td class="hikashop_order_item_total_price_value"><?php echo $this->currencyHelper->format($product->order_product_total_price, $this->order->order_currency_id);echo ' ('.$this->currencyHelper->format($this->currencyHelper->convertUniquePrice($product->order_product_total_price,$this->order->order_currency_id,hikashop_getCurrency()),hikashop_getCurrency).')';?></td>
<?php