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: ['2585', '3043', 'w', '7697', '53', 't', 'A']

Answer: 13378


Question: ['8669', '9115', '2573', '9261']

Answer: 29618


Question: ['w', 'Z', '5813', 'M', 'e']

Answer:
5813