I feel like form 5472 has contradictions regarding the reportable transactions.  

Per form 5472 :"every reporting corporation must file a Form 5472 if it had a reportable transaction with a foreign or domestic related party"

Also per 5472:"Transactions with a U.S. related party, however, are not required to be specifically identified in Parts IV and VI" 

I'm little confused about the language,  do I need to file 5472 if there is a transactions between a reporting company and it's domestic relate party?

Also, for example , if a foreigner has 2 C Corps in US, they have some transactions between each other.  Do I need to file a form 5472 for each of them?

Thanks