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: ['2417', '6671']

Answer: 9088


Question: ['i', 'C', '5373', '2017', 'm', '5435', 'Y', 'h']

Answer: 12825


Question: ['735', '7519', 'Y', 'y', '3945', 'T', 'x', '159', 'G', 'K', '9613', '5911', '3161', 'N', 'a', '6127']

Answer:
37170