Inventory type app

Does anyone have any ideas on creating an inventory management application. Here's the issue: I have an object that has all the inventory items available with some additional details (Name, SKU, Price, etc...).

I would like to have a form where a user can select many of the items, then add a quantity. Essentially, when a new delivery arrives I want to be able to check-in everything that arrived. I see how I can do it with dedicated field for each inventory item, but I have hundreds of inventory items and they change all the time.

Any insight will be greatly appreciated

I'd start with Knack's sample app Inventory Manger -