Overview, given out from stock, according to sizes

[ossa]

hello!

I am giving different workwear to about 120 workers. every workers have their own sheet, and I fill out what they got. I would like to make an overview which shows how many I have left of different sizes. Without making a row for each size. Please answer if you have a good idea. Example of my sheet is attached.

Thanks for any answer!

regards Ossa