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', 'b', 'h', 'p', '1637']

Ex Output:
1637


Ex Input:
['1423', 'i', '2627', 'g', '3205', 'J', '3745', '807', '7297', 'e', 'Q', '2241', '2561']

Ex Output:

23906