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', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']
[EX A]: 25764

[EX Q]: ['7763', '6003', 'V']
[EX A]: 13766

[EX Q]: ['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']
[EX A]:
27157