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]: ['8669', '9115', '2573', '9261']
[EX A]: 29618

[EX Q]: ['c', 'E', 'M', '1303', 'y', 'H']
[EX A]: 1303

[EX Q]: ['t', 'B']
[EX A]:
0