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:
['6217', 'A', '1925', 'o', '1433']

Ex Output:
9575


Ex Input:
['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']

Ex Output:
14533


Ex Input:
['c', '9421', '1141', '4093', 'y', '4605', '8571', '6447', '4801', 'E', '8729', 'Y', '1339']

Ex Output:

49147