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:
['1147', 'f']

Ex Output:
1147


Ex Input:
['2691', '3861', '7087', '4661', '6527']

Ex Output:
24827


Ex Input:
['K', '3247', '4469', '7147', '6869', 'Q', 'y', 'y', '5221', '3591', '8247', 'T', '5071', '2363', 'J', 't', 'Z']

Ex Output:

46225