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]: ['8147', '3191']
[EX A]: 11338

[EX Q]: ['3319', 'e', 'c', 'G', '2399', '1557', '4813', 'z', 'U', '4895', 's', '1193', 'A', 'G']
[EX A]: 18176

[EX Q]: ['O', 'x', '6183', '6859', 'Q', 'J', 'E', '1811', '7797', '2295', 'k']
[EX A]:
24945