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]: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']
[EX A]: 11558

[EX Q]: ['K', '5815', 'E', 'c', '7379', '4995', 'w', 'B', 'j', '6227', 'B', '733', '1491', '3191', '9413', '2751', 'O', 'J', '6239', '3521']
[EX A]: 51755

[EX Q]: ['j', 'm', 'x', 'T', '2969', '3735', 'G', 'r', 'a', 'y', 'g', '8501', 'p', 'a', '2583', '5933', '3257', '1329']
[EX A]:
28307