Help creating similar fields on an existing form

Hi, I'm trying to add something to the form and can't figure out how to do it. I need to add the items below to match to layout of the products above on the form already established. Please help

Roasted Tomatillo Verde Sauce

(8 oz) $3.50

10 left

Roasted Tomatillo Verde Sauce

(16 oz) $7.00

10 left

Are you referring to these fields?

If yes, those are Inventory widgets. Please follow this guide on how to add widgets on your form.

How-to-Add-a-Widget-to-Your-Form