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:
['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

Ex Output:
26791


Ex Input:
['1147', 'f']

Ex Output:
1147


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

Ex Output:

649