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:
['m', '4645', '711', 'l', '5085', '8989', '2387', 'n', 'V', '1613', '4011', '3261', 'p', 'X', '349', 'e']

Ex Output:
31051


Ex Input:
['8809', '4559', '2715', 'w', '9903', 'h', 'u', 'F', '9369', '6149']

Ex Output:
41504


Ex Input:
['v', 'w', '3139', 'c', 'f', 'X', '8707', 'z', '7071', '937', '5573', '5157', 'f', '6901', 'P', 'D', '7497', '915', '933', '2431']

Ex Output:

49261