Summary of records, help needed

dear airtable community, i would like to create a formula that sums up the size of the identical item.

in the screenshot you will see, that every record has only one size, even though its sometimes the identical sneaker.

i want it to be:

-“dunk low disrupt 2 pale ivory black” : 39 EU - 8W US [case 1: only one record with the title - nothing should be changed, just display the available size]
-“dunk low light violet (venice)” : 38 EU - 7W US [case 2: multiple records with the same title, but with the identical size - only one record should include the size they all share and the others should be empty]
-“dunk low two tone grey” : 38 EU - 5.5Y US / 44 EU - 10 US [case 3: multiple records with the same title, but with different sizes - only one record should include all the sizes which are seperated with a " / " and the others should be empty.

if anyone of you could help me with this challenge i would highly appreciate it, i hope i described the requirements understandable, if not feel free to let me know.

thanks in advance and stay safe guys! :slight_smile:

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