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: ['2975', '33', '2845', '4695', 'j', '607', 'e', 'z', '6339', '1899', 'q', 'O']

Answer: 19393


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

Answer: 18610


Question: ['x', '8175', '4139', '1605', 'L', 'Z', 'd', 'E', '469']

Answer:
14388