The CPA demonstrates that the Apple Store is the most effective channel and so more spend and a greater percentage of the total spend should be attributed to it. In contrast, online radio and podcasts are not generating good returns and so the data suggests that they should not be used moving forward and their budget allocated elsewhere on the channels that have performed more effectively. LinkedIn and Banner Ads also performed well and so along with the Apple Store, these are the three channels where most spend should be allocated as they are likely to perform best for the company in the future.