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:
['f', 'N', '8597', 't', 'K', '9755', 'j', '9747', '7259', '5493', 'n', '7269', '8493', '2279', '5369', 'f']

Ex Output:
64261


Ex Input:
['9787', '1491', '4411', '5261', 'U', '9787', 'b']

Ex Output:
30737


Ex Input:
['J', 'u', '751', '8723', '3677', '6183', '6635', 'G', 'm', 'q', '7533', 'p', '1227']

Ex Output:

34729