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I have successfully uploaded Pack hierarchy. Now I need to upload Case level however my GTIN is same for pack and Case. How do I create a case level?

I am having difficulty adding our items to Albertsons. We are an beer vendor and I need help.1) Do I need to add each, package and case? We sell our beers in 4 packs but I am not sure Albertson's criteria. Our single can barcode is same for package a...