How can I add delivery charges to product variants in Debut theme?

[MissionS]

Hello there, 

We use the Debut theme.

We are a service of fruits and vegetables baskets and we offer delivery for 5$ or drop points (free).

So we would like some help with the variants and how to add those 5$+taxes. 

Right now, I have 2 variants:

- The format of the basket

- how they want to receive the basket

Could you help me with that?

Thank you very much!