Imagine that you work for a digital marketing firm. One of your clients wants more information about the success of their campaign. After the first month of your campaign, these were the results.

You are running 3 ads for the client.

Ad 1 generates 3,000 clicks, has a CTR of 20%, a CTB of 15%, a CPC of $1, and generates $50 per sale.

Ad 2 generates 1,200 clicks, has a CTR of 5%, a CTB of 12%, a CPC of $5, and generates $80 per sale.

Ad 3 generates 6,800 clicks, has a CTR of 10%, a CTB of 4%, a CPC of $1.50, and generates $100 per sale.

Answer the following questions:

1. Ignoring the cost per click for a moment, what is the expected value of a click from Ad 1?

2. Ignoring the cost per click for a moment, what is the expected value of a click from Ad 2?

3. How many impressions did Ad 3 generate?

4. Calculate the total contribution generated by Ad 1.