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]: ['g', 'h', '9141', '7825', 'a', 'u', '2389', 'r', '9739', '8337', 'Z', 'Z', '6717']
[EX A]: 44148

[EX Q]: ['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']
[EX A]: 17914

[EX Q]: ['5557', 'v', '7027', 'b', '3897', 'y', '4875', 't', 'a', 'k', 'p', '3179', '9903', 'B', 'M']
[EX A]:
34438