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:
['1395', '3605', '6001', 's', 'h', 'T', 'K', 'X', '9413', 'X', '5099', 'c', 'f', 't', 'S', 'f', '4651']

Ex Output:
30164


Ex Input:
['3839', 'D', '4741', 'L']

Ex Output:
8580


Ex Input:
['5345', 'a', '5713', '6775', 'c', '6537', 'C', '5751', '4197', '7049', '4331', 'q', 's', '8281', '4783', 'c', '9445', '3017', 'Y', '5177']

Ex Output:

76401