IAB Plugin SKU?

I have a problem. I dont know how the sku is structured. I tried these ones:

com.CompanyName.AppName.ItemID
AppName.ItemID
ItemID
CompanyName.AppName.ItemID
managed.ItemID

But no one is working everytime i see the message: Item not found. Can you help me?

I think this will have to do with which plugin your using.
Also, are you sure you have the Item published in your developer account as well?

I am using NeatPlugs IAB plugin, and all I had to do was the ItemID after I had the item published in the dev console

GoogleIAB.Instance().Purchase("remove_ads");

I cant help if you aren’t using that plugin, as i did not use any others. But someone else may be able to help if you let us know which plugin youre using