Display Product Code When Using Options

Hi,

I'm using product options and there is a product code in every option.

When options are enabled for a particular product, the productcode from the options is printed on the frontend and NOT the product_code of the product itself.

The product_codes and quantities of the options are used to sync the products with our ERP software.

I would like the product_code from the item regardless of the options to be printed on the frontend.

After some digging i found out that the file that modifies this is: responsive/templates/blocks/product_templates/default_template.tpl

and the code responsible is: {__('sku')}:

{$product.product_code}

However, i cannot figure out what changes should i make for the desired outcome.

Any help is highly appreciated.

thank you in advance,

Menelaos