Drew is selling math textbooks and using cost-per-click (CPC) bidding for his campaign. What’s the final cost each time his ad is clicked?

Drew is selling math textbooks and using cost-per-click (CPC) bidding for his campaign. What’s the final cost each time his ad is clicked?

The projected maximum cost-per-click (max. CPC)

The average amount charged each time someone clicks on his ad

The average amount needed to make the ad appear somewhere on the page

The minimum amount needed to maintain a higher rank than the rank held by the next-highest bidder in the auction