How to add extra option to product ?

Hello, i will try to make it as clear as possible.

Let’s say I have a product page. That product is a variable product with 3 different styles available. Let’s imagine t-shirts products.

Let’s say style 1 is $5, style 2 is $10 and style 3 is $15.

I would like to add another set of options that would add to the total price.

Example:
Client select 2 of that style 2 t-shirt, which makes the total $10.
Now, i would like the client to have the choice to add an extra option for those products that would be priced only once, not matter how many products he put in the quantity fields of the product’s page.
That extra option could be “Marking (+$3.00)”
Giving a total of $13 (priced only once as I mentionned) and not $16.

Is it possible ?

Thank you