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:
['9863', 'y']

Ex Output:
9863


Ex Input:
['1679', '8893', '865', '9781', 'l', '7787', '1541', '1239', 'R', 'U', 'q', '3563', 'h']

Ex Output:

35348