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:
['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Ex Output:
6860


Ex Input:
['U', '7283', '8537', 'x', 'p', 'd', 'D', 'D', 'z', '5675', '9375', '6801', 'h', 'g', '4781', 'Q', '3649']

Ex Output:

46101