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:
['r', 'B', '8791', '3165', 'n', 'm']

Ex Output:
11956


Ex Input:
['D', 'C', '7295', 'g', 'j', '1387', 'O', '4701', 'B', 'd', 'W', 'b', 's', 'n', 'n', '4917', '2941', '1825', 'x']

Ex Output:
23066


Ex Input:
['A', 'o', '5915', 'T', 'v', 'i', '989', 'o', 'u', 's', '6543', 'A']

Ex Output:

13447