What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
Yes it is possible to achieve your requirement. If you add a quantity option in your form, it will automatically change the total price. You will have to display the total price in form. Please check the screenshot below:
The following guide should help you on how to add options in payment question: https://www.jotform.com/help/225-How-to-add-options-to-Payment-Forms
In case if you want the product pricing to change dynamically based on quantity ot any other option, you may also like to check the following guide on how special pricing works: https://www.jotform.com/help/265-What-is-Special-Pricing
Hope this answers your query.
Do try it out and get back to us if you have any trouble.