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:
['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']
answer:
28054


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


question:
['T', 'B', 'n', '1737', '6049', 'D', '1905', 'B', '7005', 'x', '7727', '6221', 'D', 'p', 'E', 'h', 'S', 'k']
answer:

30644