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:
['s', '425', '6135']

Ex Output:
6560


Ex Input:
['J', 'm', '1255', 'S']

Ex Output:
1255


Ex Input:
['2073', 'q', 'A', 'q', '6331', 'c', 'Z', 'S', '2775', 'n', '4395', 'y', '6117', '3761', 'n', '45']

Ex Output:

25497