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: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']

Answer: 19001


Question: ['6367', '9923', '9141']

Answer: 25431


Question: ['9479', 'q', '4231', 'H', '9617', 'K', '9563', 'v', '3257', '2509', 'b']

Answer:
38656