Adjustments:

Received a check for $30 representing interest due on marketable
Securities:


Interest Income: $30

And added to total Fee Income

Again, you are not being clear with the information. Receiving a check isn't an adjusting entry. So I'm not sure if the check is just information available, or whether you're making an entry for the check.

It would also depend on whether there was already something in a receivable for interest earned at an earlier date and you're just now receiving a check.

You're not presenting the info in a clear enough way to understand what the situation is or which entry you are supposed to be doing.