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]: ['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']
[A]: 33416


[Q]: ['4811', 'Q', '2289', 'N', 'I', '7681', 'z', '8179', '3359', '5299', 'R', 'z', '8697', '5781', '4803', '2715', '6511', '1371']
[A]: 61496


[Q]: ['t', '5633', '1495', 'R', 'B', 'x', '2317', '2223', '2193', '3003', 'A', 'E', 'I', 'w', '7003']
[A]:
23867