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:
['M', '9387', '7125', 'c', '1295', 'X', 'l', '9867']

Ex Output:
27674


Ex Input:
['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']

Ex Output:
21235


Ex Input:
['O', 'u', 'J', 'g', '7359', '385', '4861', 'T', 'X', '7207', '7349']

Ex Output:

27161