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: ['8871', '1297', 'W', 'f', 'Y', '8731', '113', '6707', '379', '9631', 'X', 'C', 'q']

Answer: 35729


Question: ['K', '4403', 'a', '3881', '4139', 'w', '1861', 'G']

Answer: 14284


Question: ['2257', '859', '9497', 'd', '3013', 'i', '6089', 'b', '1153', '8177', '9141', 'i', '8929', '3641', '8873']

Answer:
61629