I am a newbie when it comes to complex HTML, That's why I have a question. I am trying to build a pricing webpage like this:

Enter Product Name: (Option1, Option2)
(Category Option displayed according to which product name selected)
Option1 category: (Category1, Category2)  OR  Option2 category: (Category1,Category2)
(Pricing table according to which category selected)

A better example for this would be AWS EC2 On-demand pricing table. (Not exactly same but somewhat same idea)

I know this is possible through HTML and JS. I can build the whole HTML page with all components, just the conditional JS is out of my reach but some guidance from experts can help me. Maybe specific name of these kinds of tables?