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.

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

[EX Q]: ['8821', '7221']
[EX A]: 16042

[EX Q]: ['8489', 'm', 'd', 'x', '2641', 'a', 'E', 'w', 'X', 'v']
[EX A]:
11130