JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You can setup different prices in the same item by enabling Special Pricing.
Here's a guide on how to add options and use the special pricing to modify their prices: How to Add Options to Payment Forms?
You can check out this demo to see it in action: https://form.jotform.com/62131136999966
Please let us know if you need further assistance.