We require our clients to pay a deposit on certain services (usually 50%) up front in order to ensure clients are committed to their projects. Obviously, this number varies from project to project.
I’m creating an onboarding form and wondering if it’s possible to set the value of @price in a Payment question via a Hidden Field.
So far, it seems like Hidden Fields are strings by default. Is there a way to change that? Based on this thread, it seems there once was on option to evaluate Hidden Fields as numbers, but I don’t have that option (see screenshot).

I was hoping I could pass along something via url like
https://example.typeform.com/to/nzthWI#deposit=1000
Then use logic to add the value of @deposit to @price to dynamically update the client’s total.
Is this possible with Typeform? Or maybe another approach I’m overlooking, like directly manipulating @price from the URL?
Thanks so much for your help!