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]: ['A', 'y', 'u', 'S']
[EX A]: 0

[EX Q]: ['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']
[EX A]: 30859

[EX Q]: ['B', '8549', '1521']
[EX A]:
10070