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: ['w', '4181', 'g', 'j', '1823', 'q', 'i', '709']

Answer: 6713


Question: ['r', 'b', 'G', 'H', '255', '6809', '5133', '1059', '4317', 'P', '7219', 'd', '805', 'G', '5243', '8305', '8509', 'o']

Answer: 47654


Question: ['6099', '7751', '367', '859', 'p', 'T', '8211', 'F', '6003', 't', '8745', '2755', 'R']

Answer:
40790