Add Additional Fee to Each Product

[AZIIZ]

Hello,
I am new to the forum, and I hope this is the right place to ask this question.
I am creating a store with prestashop 1.7.3.1.
My problem is that I want to add a specific additional fee for each product (I have already added a column in the database in the table "ps_product" which contains the values to add, this fee differs from a product to another) so that the price displayed will be "Price without Tax" and the price in the basket will be:
Price (All taxes included) = Price (with no tax) + Additional fees + Tax (already defined in prestashop)
How can I proceed?

Thanks for your help

[AZIIZ]

Well, after much thought, I ended up adding this Additional Fee to the price of the product, and I modified a little tpl files of the theme to subtract this fee at the price displayed on the product card and in the list of products (front office).