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:
['1305', '1673', 'w']

Ex Output:
2978


Ex Input:
['l', '2511', '2071', 'o', 'F', '7583', '1909', '1859', '3299', '3853', 'h', 'P', 'P', '9175', 'B', 'F']

Ex Output:
32260


Ex Input:
['x', 'Z', 'n', '231', 'u', 'u', 's', '8095', 'H']

Ex Output:

8326