Mortgage Calculator with React

What are you most proud of, and what would you do differently next time?

I got the logic for the JS very fast, faster than I expected, actually, still a lot of improvement room.

What challenges did you encounter, and how did you overcome them?

The text inputs for amount, term and rate, I could not figure out how to get the characters on the side to have the background and still be "combined" with the input. I stumbled with a tutorial on a similar app and saw the user do it.

Also, the fact that I had to custom make the radio buttons.

What specific areas of your project would you like help with?

Overall, I feel that my use of React is still very clumsy, I'm not taking full advantage of it, I have a lot of code in one file.