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:
['b', 'W', 'V', 'R', '3761', 'U', '4553', '1803', 'W', '7775', '1067', 'Y', 'D', '3159']

Ex Output:
22118


Ex Input:
['D', '7807', '9395', 'T', 'c', '5139', '2827', 't', 'T', 'm', '3717', 'U', '3225', '7419', '2481', 'p', 'C', '5277']

Ex Output:
47287


Ex Input:
['r', '5757', '3127', 'S', '2829', '3415', 'q', 'V', 'S', '873', '2411', 'i']

Ex Output:

18412