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]: ['D', 'P', '9951', '2897', 'V', 'C', 'B', 'H', 'c', 'h', '2843', 'a']
[EX A]: 15691

[EX Q]: ['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']
[EX A]:
14354