Best approach to create an order with multiple items in it

Hi everyone,

I’m working on a Softr product in which people can add multiple items to a transaction and then submitting it.

The user experience I’m looking for is:
1- User selects product from drop down and its quantity. Clicks on “add”
2- Repeats as many times as wished
3- Finishes the order and proceeds to payment.

As simple as this might sound, I couldn’t find how to implement it using Softr and Airtable.

Do you guys have any experience on this? or heard anyone who managed to solve this?