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]: ['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']
[A]: 22172


[Q]: ['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']
[A]: 27157


[Q]: ['u', '6631', 'i', '5775', '5567', 'E', 'W', '7005', 'z', '3547', '8223', 'a', '2235', 'J', '4685']
[A]:
43668