You are tasked with designing a inventory restocking notification system for Amazon Go,

Amazon Go is a automated grocery store where a user can scan their mobile app and go and grab item off the shelf.

you need to design two parts.

one for which the customer to use,
and one for which the employee will get notified when teh inventory is low to restock the shelf.

key notes to watch out for:

How will you get the message when the inventory is low?

How will you know which shelf to stock and how much of an item to stock?

How will you handle lunch time and dinner time when the traffic increases a lot?

how will you know when to stock the items?

How do you determine which item to fill?