The formula to calculate the Cost Per Mille (CPM) is:
\[ CPM = \frac{TC}{\frac{TQ}{1000}} \]
Where:
Let's say the total cost (TC) is $500, and the total quantity (TQ) is 20000. Using the formula:
\[ CPM = \frac{500}{\frac{20000}{1000}} \]
We get:
\[ CPM = \frac{500}{20} = 25 \, \text{\$/1000} \]
So, the cost per mille (CPM) is $25 per 1000.