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]: ['D', '8591', 'b', 'n', 'e', '883', '8923', '245', 'z', '5643', 'C', '2911', '9275', '711', '7299', '3449', '4799', '6065']
[EX A]: 58794

[EX Q]: ['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']
[EX A]: 37574

[EX Q]: ['T', '7457', '145', 'd', '5721', 'z', 'k', 'T']
[EX A]:
13323