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:
['r', '3139', 'C', 'L', '7335', 'v', '9861', 'F']

Ex Output:
20335


Ex Input:
['8207', '4791', '3925', 'b', 'Z', '8471', '9215', '3117', 'p', '9095', 'h', 'k', 'E', 'h', '6047']

Ex Output:
52868


Ex Input:
['v', 'x', 'H', 'i', '4237', '3147', '8895', '7721', 'w', '3535']

Ex Output:

27535