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: ['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']

Answer: 27212


Question: ['q', 'I', 'E', 'M', 'T', 'i', '8719', 'r', 'V', '9759', 'I', '1793', 'Q', 'P', '5263', 'I', 'O', '8603', 'y']

Answer: 34137


Question: ['L', 'Y', 'X', '1989', '8147', 'k', 'N', '8409', 'k', '3989']

Answer:
22534