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: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']

Answer: 36604


Question: ['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']

Answer: 14668


Question: ['1391', 'T', '5993', '359', 's', '1667', 'a', '1733', 'Y', '2823']

Answer:
13966