Create a project with javascript functions instead of triggers developed entirely in ChatGPT

I am not a javascript developer, in fact I know almost nothing about it. I wanted to experiment with calculations but did not want to mess around with dozens of triggers and state.  So I had a conversation with ChatGPT and after a bit of 'negotiation' and explanation the chat resulted in a working project reliant almost exclusively on Javascript other than one or two layers and a couple of triggers.  You just need to enter details into two of the three fields. Here it is: DEMO