I would like to add to a price I have in CSV a percentage that I have on an attribute (when I update the product). For example, in my CSV I have: sku price xx 18,08
On Magento I have a percentage in an attribute where, for the product xx, it has value "18%"
I want to insert the "price" value of csv + 18% in "new_price".
Is there any way to do this?