Question: That's great, thank you. Then could you please let me know what is the sum of those two accounts?
SQL: SELECT T2.balance + T3.balance  FROM accounts AS T1 JOIN checking AS T2 ON T1.custid   =   T2.custid JOIN savings AS T3 ON T1.custid   =   T3.custid WHERE T3.balance  >   ( SELECT avg ( balance )  FROM savings )