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 Input:
['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']

Ex Output:
14668


Ex Input:
['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']

Ex Output:
36146


Ex Input:
['5961', 'R', 'R', 'C', 'm', 'f', '4163', '5933', '6279', 'a', '3389', 'q', 'L', 'x']

Ex Output:

25725