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: ['p', 'V', '673', '8483', 'S']

Answer: 9156


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

Answer: 58309


Question: ['1897', 'g', '2101', 'B', '8073', 'B', '9105', 'x', 'W', '3369', 'P', '553', '167', '7941', '6943']

Answer:
40149