Your current campaign looks like a great fit for opting-in to Target Cost Per Acquisition (CPA) Bidding. This means Google will try to serve ads that meet your Target CPA by serving ads that will have the highest conversion.
What is the Target CPA Bid Strategy?
Target CPA Bidding is Google's Smart Bidding strategy which helps to get as many conversions as possible at or below the target CPA that you've set, using advanced machine learning to optimise bids for every auction.
Source: Big Flare
Using historical information about your campaign and its conversions, Target CPA Bidding automatically finds the best bid for your ad each time it can appear. The bids are set to meet the average CPA across all their campaigns using this strategy.
This should result in a more efficient way of targeting conversions at the price you've set for them.
If this is something you would like to opt-in for, you can do so through the in-app option. If you have any other queries, email at us email@example.com.