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]: ['i', 'o', '1321', 'I', 'W', 'e', '1201', 'I', 'e', 'F', '9841', 'm', '9827', 'q', 'f', 'X', '8261']
[A]: 30451


[Q]: ['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']
[A]: 25754


[Q]: ['L', '4623', '4733', 'N', 'k', 'G', 'M', 'z', 'f', '7423', 'e', 'H', '9547', 'K', '2093', 'W', 'y']
[A]:
28419