I have a Firebase Realtime Database that stores the public transport vehicle driver's total balance, monthly balance, and daily balance as shown below:

As you can see, I got the computations wrong. But I want to know how can I be able to add the daily balance of the driver for each day, add it to the monthly balance, then to the total balance of the driver because I'm really at lost right now on what to do.

Thank you in advance for your help!