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', 'I', 'E', 'M', 'T', 'i', '8719', 'r', 'V', '9759', 'I', '1793', 'Q', 'P', '5263', 'I', 'O', '8603', 'y']
[EX A]: 34137

[EX Q]: ['1875', '9833', 'i', '7493', 'J', 'P', 'z']
[EX A]: 19201

[EX Q]: ['457', 'C', 't', 'a', 'I', 'O', '6697', '6127', 'x', '8429', '6013', 'O', 'O', 'Q', '2477']
[EX A]:
30200