He Alabama Phoenix Sun has 8,000 subscribers.

The Alabama Phoenix Sun has 8,000 subscribers. Llewellyn's Gift Shop pays $800 for a full-page ad in the newspaper. What is the cost per thousand (CPM)?
A) $10
B) $100
C) $1,000
D) $10,000
E) cannot be determined from the information given here

It's either B) $100.00, or E) Cannot be determined from the information given here. I say E because it's possible that the Alabama Phoenix Sun prints an excess of newspapers, not just for their subscribers, but for news stands, etc... in which case they would probably still charge Llewellyn's Gift Shop for the ad space. Basically, just because they have 8,000 subscribers, that doesn't mean they print up 8,000 papers, but that might be over-analyzing the question.