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.
Upon checking your form, I found that you are not using any payment tools. You should use one of our several inbuilt "Payment Tools" to list your product. This will give you a lot of inbuilt feature including displaying total payment amount and payment processing.
It's quite easy to display total with any of the payment tool. You need to just select the payment question of your form and click "Show Total" in the form toolbar.
If you just need to display the products and no payment process is required, you should use "Purchase order" which is also listed under the "Payment Tools" tab.
Hope this helps.