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]: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']
[EX A]: 25748

[EX Q]: ['x', '1305', 'b', '8193']
[EX A]: 9498

[EX Q]: ['G', '3531', '2239', '273', '9011', '2865']
[EX A]:
17919