Both Clep Principles of Management and Marketing are fairly easy Exam.

From my experience I would say take Principles of Marketing first, then Management

Alot particularry on my exams materials overaped and I was glad I did marketing first.

I am now studying for Business Law

if you do a search you will find great advice inregards to these Exams, and that will help you make your decision
All the best

Mapalo