instruction:
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.
question:
['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']
answer:
33985


question:
['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']
answer:
25764


question:
['5579', '9573', '509', 'L', '8107', '2869', 'h', 'a', 'T', '1155', '367', 'N', '1443']
answer:

29602