How to create a purchase or sourcing inquiry form?

i mean is customer key in what willing to buy , how many quantity and price , and job each will have a reference no,

can do that , 

thank for your advise

I am not sure if I understand your query correctly. If there is no payment involved with the form, you may consider using configurable list widget so that you may setup different fields to let the user to select. Please go through the guide below for more information.

https://www.jotform.com/help/282-How-to-Set-Up-the-Configurable-List-Widget

Please let us know if you need any further assistance. We will be happy to assist.