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:
['1875', '9833', 'i', '7493', 'J', 'P', 'z']

Ex Output:
19201


Ex Input:
['1305', '1673', 'w']

Ex Output:
2978


Ex Input:
['4157', 'C', 'f', '899', 't', 'W', 'y', 'V', 'p', '4095', 'f']

Ex Output:

9151