How can I assign Calculation Property Values to a Radio Button?

You can learn more about that on the user guide How to Assign Calculation Value.

Calculation value is generally used for calculations. It represents as the number value of the text options. This is available on radio, check box and dropdown tools.

I can confirm that Bryan has shared the right guide for assigning calculation values correctly.

Here's a quick screenshot just to show you at a glance where to add them below.