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:
['2683', '4431']

Ex Output:
7114


Ex Input:
['O', 'j', 'Z', 'u', '7427', '4225', '3139', '9993', '9945', '3639', 'h', 'j', 'f', '6511', 'e', '4607', '2741', '4743']

Ex Output:
56970


Ex Input:
['o', '7153', '1845', '2563', 'b', 'p', 'T', '1733', 'R', 'p', '697', '4257', '8409', 'P', '1493', '343']

Ex Output:

28493