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', '5201', '2787', 'z', '9465', 'X', 'X', '4017', '8305', 'y', '6897', 'y', '6045', '9863', 's', 'd', '3611', 'l', 'd']

Ex Output:
56191


Ex Input:
['W', 'c', '7971', 'J', 'o']

Ex Output:
7971


Ex Input:
['p', '1129', 'X', '8479', 'C']

Ex Output:

9608