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:
['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']

Ex Output:
9898


Ex Input:
['I', '7815']

Ex Output:
7815


Ex Input:
['1535', '7791', '6341', '2679', '4953', '3305', '1549', 'L', 'K', 'D', 'l', 'y', 'i', 'u', '4495', 'S', '3661', 'e']

Ex Output:

36309