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:
['o', 'a', 'K', '6031']
answer:
6031


question:
['V', '8137', 'b', 'k', '2081', 'L', '9733', '7525', 'D', '2381', 'O']
answer:
29857


question:
['r', '8403', '1005', '9511', 'x', 'K', '1311', '7785', '9391', '5541', '9569', 'i']
answer:

52516