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: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

Answer: 30361


Question: ['1073', 'i', 'o', 'j', 'O', 'g', 'X', '3261', '5105', '4831', 'J']

Answer: 14270


Question: ['6259', 'k', 'b', 'N']

Answer:
6259