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: ['o', 'a', 'K', '6031']

Answer: 6031


Question: ['3071', '355', 'e', '9781', 'R', '6833', 's', '2665', 'L', '9551', 'P', '6101', '2955', '4643', 'O', '3327', '2163', '685', '4277', 'B']

Answer: 56407


Question: ['2647', 'O', 'O', 'g', '8749', '4135', '1735', 'q', '9073', 'a', '6183', 'F', 'h', 'M', '7037']

Answer:
39559