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]: ['6645', 'k', '4879', 'N', '113', 'L', 'x', '8365', 'v', 'A']
[EX A]: 20002

[EX Q]: ['6723', '1', '6357', '1497', 'A', 'p', 'N', 'T']
[EX A]: 14578

[EX Q]: ['q', '1071', 'X', '2503', '9539']
[EX A]:
13113