Answer:
$60
Explanation:
Cost per mile or cost per thousand is the amount the advertisers charge for every 1000 views. It is the cost incurred when an advertisement is exposed to 1000 people.
The CPM formula is CPM = 1000 * cost / impressions .
For yelp, the cost is $1800, and impressions are 30,000
CPM= 1000 x $1800
30,000
CPM = $1,800,000/30,000
CPM = $60
