Keep track of attributes with inventory

[Kevin205]

Looking for a solution to manage products with attribute inventory:

such as:
Shirts with 3 different size of XL, L, M & S.
Each size has a different price
Each size with quantity in the inventory.

I have tried Stock by Attributes, but it does not work for me, as it does not keep track of individual inventory on the product info page. It sums up and display all attribute inventories together.

And it would be a definite plus if it could work along and compatible with EP4, otherwise it is impossible to input and manage 100s of quantities of product.

Please advice. Thank you.