BearPark, a bottled water manufacturer, has decided to invest in a banner ad on a national news website. The ad is served 441,246 times each day and typically generates 8,869 clicks per day. Total costs for the banner ad are estimated at 10,259. On average, 24 of those clicking on the advertisement proceed on to the bearpark.com website, but it turns out that the average number of visits to the website via the advertisement is 2.1 . What is the average cost per click for the advertisment