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: ['x', '9895', 'r', 'H', 'C']

Answer: 9895


Question: ['J', '5149', 'H', 'L', 'm', 'h', '3863', 'n', 'z']

Answer: 9012


Question: ['5771', 'x', '6447', 'E', '95']

Answer:
12313