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]: ['4437', '1265', '1519', 'K', 'Q', 'b', 'n', 'J', '6631', 'K', 'q', 'D', 'U', 'u', '3653', '5169', 'L', 's']
[EX A]: 22674

[EX Q]: ['J', '5149', 'H', 'L', 'm', 'h', '3863', 'n', 'z']
[EX A]: 9012

[EX Q]: ['5333', '5781', '5307', '809', '5875', '9273', '7655', '4297', '5119', 'w', '8605', 'H', '2853', '7455', '1163', '6459', '6625', 'U', 'z', '5773']
[EX A]:
88382