You can use GPL code commercially, as long as you release what needs to be released as GPL for the AGPL, that's probably your entire codebase. You cannot use A

You can use GPL code commercially, as long as you release what needs to be released as GPL for the AGPL, that's probably your entire codebase. You cannot use AGPL code in non-AGPL codebase or as a library in a non-AGPL. Same for LGPL, except you can use LGPL code as a dynamic library in a non-GPL codebase, as long as you redistribute modifications to the LGPL code. You can sell *GPL software or services around it.