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: ['8669', '9115', '2573', '9261']

Answer: 29618


Question: ['7023', '9707', 'e', '6263', 'a', '5577', '3643', '1595', 'A', 'D', '3347', '5935', '2785', 'l']

Answer:
45875