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]: ['r', '2251', 'X', 'H', 'a', '5463', 'g', 'M', '9797', '1581', 'o', 'm', 'v', 'E']
[EX A]: 19092

[EX Q]: ['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']
[EX A]: 26303

[EX Q]: ['A', '8689', 'S', '2621', '2559', '9839', '5937', 'R', 't', '6373', '4051', '3253', '9971', '8707']
[EX A]:
62000