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: ['2237', '2597', '2593', 'Y', '5345', 'g', 'l', 'I', 'p', 'u', 'L', 'T', '617', '9759', 'b', 'w', '7097', '9863']

Answer: 40108


Question: ['3839', 'D', '4741', 'L']

Answer: 8580


Question: ['B', '4995', 'E', '7639', 'U', 'i', '7915', '5083', 'k', 'c', 'D', 't']

Answer:
25632