CJP, a makes of women's necklaces sells their product direct on their website. The price for a necklace is $100 and their variable cost is $30 for each necklace. They have found an influencer they would like to work with who charges a CPM of $20 per post for their 40,000 followers. They want to try just one post from the influencer to try out this type of advertising. 

What is the cost of this promotion?