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]: ['6161', 'p', '2839', 'c', '5905', '1729', 'j', '5901', '3013', 'e']
[EX A]: 25548

[EX Q]: ['A', '9979', '8723', '1131', 'i', 'p', 'M']
[EX A]: 19833

[EX Q]: ['7855', '9437', '9839', '1281', '281', 'p', '3185', 'u', '7885']
[EX A]:
39763