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

Answer: 9012


Question: ['v', 'Y', '4135', '8645', '263', '5377', '8677', 'Z', 'W', 'g', 'n', 'r', 's', '8513', '5677', 'u', '3033', 'I']

Answer: 44320


Question: ['7535', 'B', '681', '9601', '9185', '8545', 'd', '951', 'v', 'i', '8223', 'E', '9185', '9343', 'x', '5725', '1235', '7673', '403']

Answer:
78285