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]: ['4607', 'T', 'a', '6077', 'c', '4761']
[A]: 15445


[Q]: ['f', '6703', 'c', 'c', 'l', '2511', '6507', 'b', '9727', 'l', '1251', 'I', '5231', '91', 'L', 'M', 'd']
[A]: 32021


[Q]: ['245', '4629', 'Q', 'b', '3933', '9931', '2343', 'Q', 'u', '3403', '6039', 'M', '5167', '7283', '8011', 'Q', '7089', 'B']
[A]:
58073