How to combine large datasets with calculations in Excel

Hi all, hope everyone is doing fine.

I wanted to ask the opinion of the community on a project I'm currently working on. I want to create a dashboard that will help me keep track of product stock in certain stores, let me create statistical figures on products, categories, and stores, and will alert me on possible inventory breaks (products running out of stock in certain stores).

The main issue I'm facing is that I have more than 40k combinations of products and stores, hence I'm not sure on how to work on a long term feasible solution since I haven't done something similar in the past. My main objectives are:

1. 1. Create a dashboard that will give me average numbers of total stock numbers as a general KPI, along with its historical data.
2. 2. Create lists of products that are likely to run out of stock, following a certain rule (as in, more than 5 products left at the end of the week).
3. 3. Create datasets of historical data for these numbers (totals, for each product/store combination).
4. 4. Perform calculations (geographical averages, identify outlyers, products or category averages, etc.) along with their historical evolution.
5. 5. Easily include weekly new data into the model.

I'm attaching an example of the input format (simplified), and I'll answer any questions on issues that may have not been clearly depicted. Should I consider using SQL databases? Should I be thinking of creating a VBA script? There are many points where I am not clear, so I hope you guys can help me, any/all advice is welcome.

Kind regards,
Pedro