First Round : 16 "OK Google !" 5/5 : 0.01ETH

Second Round : 8 items combine 2 "OK google" - 4/4: 0.02 ETH

Third round 4 items include 2 items from round 2 - 3/3: 0.04ETH

Fourth round: 2 items combine 2 items from round 3 - 2/2: 0.08Eth

Fifth and last round: 1 item includes the 2 items of round 4 - 1/1 0.16ETH