Answer: To check the final storage cost you paid for a Kukai activity, you can go to the Kukai activity list and click on the transaction time. This will take you to the tzKT explorer where you can view the transaction and see the final storage cost you paid. You can also view other details such as the amount of time it took to complete the transaction, the amount of Tezos that was sent, and the amount of Tezos that was received. This will help you to keep track of your storage costs and make sure that you are paying the correct amount for each transaction.