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

Answer: 43470


Question: ['g', 'A', 'm', '4005', '8079', 'G']

Answer: 12084


Question: ['z', '7945', '5819', '161', 'H', 'o', 'l', '1571', 'F', '2119', '199', 'W', '3251', '3661', '6913', '1767']

Answer:
33406