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]: ['w', '8035', 'J', '2671', '7509', '1573', '6915', '8569', '345', 'T', 'P', 's', '1341', '7823', '8671', 'm', 'Q', 's', 'N']
[A]: 53452


[Q]: ['8809', '4559', '2715', 'w', '9903', 'h', 'u', 'F', '9369', '6149']
[A]: 41504


[Q]: ['C', 'Q', '4993']
[A]:
4993