Kevin Delson , Jan 04, 2010; 11:00 a.m.
This question is not answerable w/o some more information from you.
What other people charge is not what I charge, you charge or a thousand other shooters might charge.
What did these execs get for their $550?
What size prints do they want?
Framed or unframed?
B&W conversions or no?
Archival papers or 1 hr specials?
It seems to me if you were able to determine the sitting fee for 5 people, figuring print prices should be a slam dunk no brainer.