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: ['3883', 'T', '6175', 'B', '4365', '3719', 'V', 'B', '3173', 'K', 'Z']

Answer: 21315


Question: ['K', '479', 'u', '3489', 'o', '9589', '7153', '7649', '123', 'a', 'A', '3951', '847', 'N', 'R', '947', '9243', 'G', 'a']

Answer: 43470


Question: ['J', 'j', '9357', 'v', '4061', '4429', 'P', 'l', '8755', 'v', '9605', '8213', 'J', '8191', 'G', '9571', 'L', 'c', 'R', 'H']

Answer:
62182