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:
['r', '2251', 'X', 'H', 'a', '5463', 'g', 'M', '9797', '1581', 'o', 'm', 'v', 'E']

Ex Output:
19092


Ex Input:
['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']

Ex Output:
32209


Ex Input:
['8205', 'z', '8951', '4637', '9613', 'g', '8319']

Ex Output:

39725