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: ['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']

Answer: 3566


Question: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']

Answer: 25748


Question: ['R', '91', '4805', '7911', '9349', '5113', 'o', 'p', 'E', 'L', 'x', '1121', 'y', 'C', 'a', 'T', '9587', 'u']

Answer:
37977