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: ['z', 'U', '6817', 's', '3731', 'M', 'I', '1095', 'l', '5993', '5207', 'e', 'L', '5361', 'v', 'g', '1963', '4829', '9541', '8261']

Answer: 52798


Question: ['D', 'P', 'y', '4891', '1539', 'J', '5737']

Answer: 12167


Question: ['7343', '8751', 'J', '1211', 's', 'G', '1115', 'j', '4457', '5055', '6025', '9351', '6911', 'a', '4403', 'D']

Answer:
54622