In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

[Q]: ['C', '9973', 'b', '693', 'y', 'H', 'C', 'P', 'b', 'J', 'f', 'T', '2317', 'O', '5755', '8201', 'p', 'y', '8721', 'i']
[A]: 35660


[Q]: ['7831', 'O', '6017', 'v', 'U', '5761', 'Q', 'Q', 'w', '8465', 'Z', 'P', 'i', 'u', '1635', 'n', '8471', '4213']
[A]: 42393


[Q]: ['i', 'b', '2499', '2023', '8491', '8189', 'J', '1297', '7619', 'L', 'R', 'L', 'r']
[A]:
30118