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]: ['2225', '1925']
[EX A]: 4150

[EX Q]: ['z', '447', '9781', 'R', '6083', 'u', '9229', 'Z', 'F', '2437', '9677', 'n', 'G', '6763', '5883', 'B', '9563', '4575']
[EX A]: 64438

[EX Q]: ['6379', 'o', '5815', '3723', 'k', 'a', 'T', '3565', '3149', 'e', '2435', '6447', 'N', 'O', '6723', '3389', '2071']
[EX A]:
43696