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]: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']
[EX A]: 25748

[EX Q]: ['Q', '8317', '8989']
[EX A]: 17306

[EX Q]: ['5843', 'O', '8249', '8371', '9289', 'd', 'R', 'Z', '1391']
[EX A]:
33143