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:
['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']
answer:
41788


question:
['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']
answer:
20070


question:
['l', '5169', 'g', '6011']
answer:

11180