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]: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']
[EX A]: 28041

[EX Q]: ['6563', 'R', 'M', 'B', 'b', 'E', '9911', '7327', 'J', '7389', 'w', 'b', 'c', '1527', 'K', 'r', '5441', '6823', '8455']
[EX A]: 53436

[EX Q]: ['e', 'h', '3505', 'K', 'D', '9287', 'Z', '3659', '4787', 'i', '6485', '5071', '8251', 'V', '7599', 'w']
[EX A]:
48644