Chanells confusion…

Hello, may I ask you for clarifying what type of channel should I use?
GM is showing me that I have “Missing inventory data”, so:
1) Should I use “Google local products” or “Google local products inventory” chanell?
2) I have tried to make new feed based on both chanels I mentioned abowe, but… if I chose “Google local products” there is missing “invetory” field, if I chose “Google local products inventory” thare is not possible to add all other common fields like “Name”, “Main image” etc. so does it mean, that I should have multiple type of feeds, that I should to send to Google?

Thanks you