The answers of 1000 for each are correct. As others have also, I fully upgraded mine. Of course, I wouldn't be shocked if a future release allowed for further expansion.

I have included a screenshot of my 1000 each and what the store says about my Storage/Bag being fully upgraded.

Have a great day!
[![enter image description here][1]][1] 


  [1]: https://i.sstatic.net/X8gUI.jpg