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]: ['2683', '4431']
[EX A]: 7114

[EX Q]: ['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']
[EX A]: 15293

[EX Q]: ['725', 'r', 'h', '2607', '2299', '6223', '6189', 'l', 'e', '9757', '8609', 'B', 'Q', 't', 'Q', 'a']
[EX A]:
36409