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

[EX Q]: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']
[EX A]: 30361

[EX Q]: ['P', 'G', 'i', 'U', 'J', 'U', '9843', 't', '7705', 'F', 'q', 'I', 'j', '2825', 'r', 'N', '1215', 'U', 'k']
[EX A]:
21588