Squarespace Code Needed

I need a Squarespace EXPERT, who can make a code for me. I am designing a website, which will feature courses. There are various payment options such as full price, deposit, and balance, so the clients can pay accordingly.

Squarespace adds the lowest price variant, with "From Price". I need it to show the full price only in every case where variants are used.

You will let me know where to inject the code and I will, preferably only once so the client can update their page easily once I have delivered the project.

Screenshot attached.

Thanks,
Iana