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: ['8821', '7221']

Answer: 16042


Question: ['W', 'c', '7971', 'J', 'o']

Answer: 7971


Question: ['581', 'm', 'o', 'd', 'n', '4933', '7291', '6015', 'f', '9553', '6679', '21', 'L', 'c', 'N', '5661', 'Y', 'T', '3799']

Answer:
44533