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]: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']
[EX A]: 41173

[EX Q]: ['h', '9539', '3373']
[EX A]: 12912

[EX Q]: ['J', '6517', '9357', 'R', 'x', '8571', '631', 'G']
[EX A]:
25076