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: ['7411', 'Y', 'x', 'l', '4119', '7241']

Answer: 18771


Question: ['o', 'J', 'B', '7765', '7781', '5513', '8721', 'u', '9557', 'C', 'A', '1281', '6565', 'H', '5559', '1695', '7577']

Answer: 62014


Question: ['4753', '3179', 'O', '5139', 'i', 'T', '4879', '3329', '5563', '5813', 'b', 'd', '4009', '1585']

Answer:
38249