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.
Please take a look at this guide on how to set up quantity fields, as well as other useful properties:
If this is not what you are looking for, please let us know with more details and we will be glad to help and assist.