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]: ['W', '8593', '9427', '9931', '8919', 'X', 'B', '8861', '1933', 'Z', 'V', '3427', 'S', '8717', 'd', '1593', '7659', 'Q', 'n']
[EX A]: 69060

[EX Q]: ['29', 'N', '5061', '7191', 'z', '8367']
[EX A]: 20648

[EX Q]: ['5087', '4519', 'V', '6273', '9539', 'H', '2579', 'L', '6991', '6857', '8903', 'y', '4999', 'f', 'P', 'n', 'D']
[EX A]:
55747