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: ['w', 'I', 't', '813', 'K', '5785']

Answer: 6598


Question: ['q', '8155', 'L', 'v', '2657', 'X', 'v', '2353', '151', 'R', '967', '4327']

Answer: 18610


Question: ['8437', '1015', 'h', 'P', '6933', 'A', '5463', '2297', 'j', 'A', '8247', 'Y', 'L', '537', '9809', 'O']

Answer:
42738