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:
['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

Ex Output:
31575


Ex Input:
['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']

Ex Output:
8039


Ex Input:
['y', 'k', '2245', 'R', '5313', 'l', '2127', '4751', '9277', 'v', '8017', 'J', '1655', 'l', 'y']

Ex Output:

33385