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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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How do you decrement quantity on hand as users enter quantities and submit form?Asked by Larry Pensinger on October 23, 2014 at 10:02 AM
I'd like to offer products of limited quantity and reduce the on hand inventory as users submit the form with a quantity. The updated quantity would then show on the form for the next person to view and order accordingly. At some point the quantity on hand might reach zero and no more would be available.
JotForm Support Manager
We got a widget called Inventory that might be very useful for what you are looking for:
Please take a look at it, it does exactly what you need. However, if you need more help with this, we are here to assist you!