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: ['u', 'W', '1561', '9243', '4923', '9385']

Answer: 25112


Question: ['n', 'G', '5059', '8343', '8673', 'P', 'N', '5485', '2279', '6121', 'i', 'U', '7277', '8701', 'A', 'b', 'Z', 'R', '6371', 'G']

Answer: 58309


Question: ['9113', 'Z', 'm', '4017', 'f', '5049', '3791', '3661', 'm', '6735', '2333', 'e', 'S', '2421', '1505', '9965', '443']

Answer:
49033