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: ['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

Answer: 26791


Question: ['d', 'b', 'W', '3201', 'C', 'o', '5187', '9723', '8177', 'F', '6703', 'U', '1393', '1035', '3507', '5993', '3857', 'r', 'C', 'j']

Answer: 48776


Question: ['Y', '8169', '9067']

Answer:
17236