The cost for our pay per click advertising services can be broken up into a flat fee and percentage of sales made. A Flat fee: This is for additional work that needs to be completed aside from running the ad itself. Such as the following: ad copy updates, rotating ads and landing page creation. Our flat rate is $649/month. Percentage of sales made: We believe that paying for results keeps you happy and it strengthens our relationship. We charge 20% of the sales we generate for your business.