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:
['7215', 'd', 'q', 'k', '9301', 'P', 'x', 'C', 'g', 'e', 'o', '2769', '6993', '9769', 'v', '9007', '4131', '8627', 'q']

Ex Output:
57812


Ex Input:
['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']

Ex Output:
24749


Ex Input:
['u', '5355', '1205', 'L', '5355', 'S', 'y', '2267', 'B', '547', 'D', 's', 'S', 'p', 'T', '777']

Ex Output:

15506