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:
['7335', '813', '6461', '8903', '3709', 'V', 'G', 'I', 'P', 'p', 's', 'v', 'R', '4697', '4263', '9897']

Ex Output:
46078


Ex Input:
['4161', 'E']

Ex Output:
4161


Ex Input:
['829', 'i', 'l', 'y', '885', 'd', '8329', '4357', '3903']

Ex Output:

18303