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: ['C', 'v', '1353', 'e', 'x', 'A', 'D', '1243', '477', 'z', '3483', '5213', 'k', 'm', 'n']

Answer: 11769


Question: ['2325', '3259', '1947', '8065', 'H', '2329', 'h', 'l', 'k', 'R']

Answer: 17925


Question: ['i', '447', 't', 'Z', 'L']

Answer:
447