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]: ['Y', 'X', 'd', 'N', '1877', '2865', 'M', '1249', '9385', 'v', 'o', 'P', 'P', '6029']
[EX A]: 21405

[EX Q]: ['w', 'V', '3359', '8847', '7551', '2481', 'Y', 'j', 'L', 'G', '7905', 'v', '4141', '2229', 'k', 'H', '3517', '3885', '3665', 'O']
[EX A]: 47580

[EX Q]: ['8693', '2723', 'Z', 'F', 'Y', '5077', 'A', '9465', 'X', '7833', '8137']
[EX A]:
41928