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I want to implement in-app-purchase in iOS App. I have a list of records that have digital audio assets. I want to implement like a product id "com.product.id" and using this product id i want to implement and user can purchase n number of products using in-app from app.As Example : user1 can purchase product "xyz" of price $9.99 having the same product id "com.product.id". then same user1 can purchase product "abc" of price $9.99 having same product id "com.product.id".

i am creating a iOS mobile app which have digital audio assets and there are list of that audio assets and that adds via server side. so i want to sell that digital audio assets via in-app purchase and add dynamically and sell dynamically.so how can i make in app purchase to work with multiple of these files so user can purchase 10 files or 5 files one by one using in app purchasethis are not audio songs it's special digital assets and it's not something that can be sold on Apple Music.