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:
['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']
answer:
45463


question:
['251', '2155', '5029', 'k', 'j', 'I']
answer:
7435


question:
['O', 'B', '5485', '5673', 'L', 'D', '8635', '3375', '2305', 'x', '2251', 'B', 'Q', 'H']
answer:

27724