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:
['5233', 'i', 'Z', 'v', '4531', 'j', '61', '1725', '5915', '1677', 'F', 'K', 'M', 'Z']

Ex Output:
19142


Ex Input:
['s', 'd', 't', '8235', '2279', '7477', '3029', '4377', '9153', '4309', '2295', '407']

Ex Output:
41561


Ex Input:
['q', '6709', '1501', 'F', '9395']

Ex Output:

17605