Which widget should I use to allow selection and decrease the available items?

Which widget should I use to perform the following :

For example, I have a defined number of positions or items available. Each time a subscriber picks up an item, the number of available items should then decrease. When no more items are available, the form should warn about the soldout.

Thanks for your help.

We have the following widgets that you can use to do that:

https://widgets.jotform.com/widget/ticket_purchases

https://widgets.jotform.com/widget/gift_registry

https://widgets.jotform.com/widget/quantity_gift_registry

https://widgets.jotform.com/widget/appointment_slots

https://widgets.jotform.com/widget/inventory 

Please follow our steps in this guide to add the widget in your form: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form.