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:
['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']

Ex Output:
14533


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

Ex Output:
46078


Ex Input:
['2097', '2557', 'Y']

Ex Output:

4654