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:
['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']

Ex Output:
36242


Ex Input:
['7087', 'P', 'i', 'e', '4875', 'e', 'F']

Ex Output:
11962


Ex Input:
['H', 'P', '6557', '311', '511', 'A', '8147', '2465', '143', '8547', 'G', 'A', '1071', 's', 'j']

Ex Output:

27752