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: ['f', '6703', 'c', 'c', 'l', '2511', '6507', 'b', '9727', 'l', '1251', 'I', '5231', '91', 'L', 'M', 'd']

Answer: 32021


Question: ['1123', '2765', '9395', '9695', '7963', '3813', '9987', 'y', 'N', 'F', '2757', 'o', 'r', '4827', '3523', 'G', 'j', '9785', 'C']

Answer: 65633


Question: ['1335', '5485']

Answer:
6820