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', 'X']

Answer: 0


Question: ['q', 'Y', '6021', '4045']

Answer: 10066


Question: ['o', 'X', 'm', 'A', '8141', '919', '6717', 'v', '2291', 'z', 'm']

Answer:
18068