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]: ['2765', '6767', '7645']
[A]: 17177


[Q]: ['5435', '1605', '7819', 'U', '35', 'g', '4799', 'g', 'r', 'h', 'a', '9691', '1277']
[A]:
30661