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]: ['x', '1305', 'b', '8193']
[EX A]: 9498

[EX Q]: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']
[EX A]: 11558

[EX Q]: ['4677', '1535', 'w', 'J', 'c', 'I', '9571', '9693', '6531', 's', 'b', '541']
[EX A]:
32548