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:
['9903', 'H', '757', 'J', '6481', '9789', 'H', '3285', 'V', 'X', '5229', '7197']
answer:
42641


question:
['B', '9189', '3691', '2869', '1525', 'd', 'H', 'P', '8613', 'b', 'r', '5289', 'V', '6433', '8733', 'K', '8105', '1041', 'U', 'L']
answer:
55488


question:
['i', 'C', '4657', '621', 'k', 'q', '2017', 'c', 'k', 'Q', 'F', '7251', '4067', 'r', 'w', 'X', '4623', 'h', '6273', '2617']
answer:

32126